When the block is pulled out to x = +4.0 cm, we must apply a force of magnitude 370 N to hold it there. We pull the block to x = 14.0 cm and then release it. How much work does the spring do on the block when the block moves from xi=+5.0 cm to (a)x= +4.0 cm, (b)x=-4.0 cm, (c)x=-5.0 cm, and (d)x=-9.0 cm?