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Block on a Spring A block on a horizontal frictionless surface attached to a spring. Diagram is not to scale. 21 21 5970 dino II bas I 1X bos + Xmax uop aunge ath enterw wel odnot vir 0000909008008060600806 OP X) 7 11. Refer to the diagram Block on a Spring to answer this question. The block in the diagram is attached to a spring on a horizontal frictionless surface, as shown. When the block is released, it oscillates back and forth between the positions indicated by the vectors X. Which points (I, II, and III) best indicate where the velocity of the block will be zero? a. I, II, and III c. II only b. I and II d. I and