Explanation of Responses:
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(1)
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Transaction made pursuant to duly adopted trading plan under Rule 10b5-1(c).
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(2)
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This transaction was executed in multiple trades at prices ranging from $354.85 to $355.83. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(3)
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This transaction was executed in multiple trades at prices ranging from $356.24 to $357.21. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(4)
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This transaction was executed in multiple trades at prices ranging from $357.27 to $358.25. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(5)
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This transaction was executed in multiple trades at prices ranging from $358.34 to $359.24. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(6)
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This transaction was executed in multiple trades at prices ranging from $359.45 to $360.39. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(7)
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This transaction was executed in multiple trades at prices ranging from $360.61 to $361.60. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(8)
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This transaction was executed in multiple trades at prices ranging from $361.63 to $362.59. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(9)
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This transaction was executed in multiple trades at prices ranging from $362.65 to $363.60. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(10)
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This transaction was executed in multiple trades at prices ranging from $363.71 to $364.38. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(11)
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This transaction was executed in multiple trades at prices ranging from $365.15 to $366.13. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(12)
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This transaction was executed in multiple trades at prices ranging from $366.16 to $367.13. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(13)
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This transaction was executed in multiple trades at prices ranging from $367.20 to $368.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(14)
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This transaction was executed in multiple trades at prices ranging from $368.20 to $369.19. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(15)
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This transaction was executed in multiple trades at prices ranging from $369.20 to $370.16. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(16)
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This transaction was executed in multiple trades at prices ranging from $370.24 to $371.21. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(17)
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This transaction was executed in multiple trades at prices ranging from $371.24 to $372.23. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(18)
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This transaction was executed in multiple trades at prices ranging from $372.24 to $373.21. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(19)
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This transaction was executed in multiple trades at prices ranging from $373.24 to $373.60. The price reported above reflects the weighted average sale price. The reporting person hereby undertakes to provide upon request to the SEC staff, the issuer or a security holder of the issuer full information regarding the number of shares and prices at which the transaction was effected.
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(20)
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As Trustee of the Hastings-Quillin Family Trust
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