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A spring and block are in the arrangement of the figure. When the block is pulled...

A spring and block are in the arrangement of the figure. When the block is pulled out to x = +5.0 cm, we must apply a force of magnitude 370 N to hold it there. We pull the block to x = 13.0 cm and then release it. How much work does the spring do on the block when the block moves from xi = +6.0 cm to (a) x = +4.0 cm, (b) x = -4.0 cm, (c) x= -6.0 cm, and (d) x = -10.0 cm?

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