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 $262.09 to $263.07. 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 $263.09 to $264.08. 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 $264.10 to $265.05. 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 $265.10 to $266.09. 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 $266.30 to $267.29. 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 $267.33 to $268.09. 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 $268.54 to $269.53. 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 $269.64 to $270.61. 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 $270.71 to $271.67. 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 $271.72 to $272.71. 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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As Trustee of the Hastings-Quillin Family Trust
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