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During each cycle, the vertical displacement s of the end of a robot arm is given by s= (12 - 8t) (212 - t+ 1),

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During each cycle, the vertical displacement s of the end of a robot arm is given by s= (12 - 8t) (212 - t+ 1), where t is the time. Find the expression for the instantaneous velocity of the end of the robot arm. . .. O A. 813 - 5112 + 18t - 8 O B. 812 - 34t +8 O c. 8+3 - 4912 + 18t + 8 O D. 2+3 - 5112 + 9t - 8

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