The first figure gives spring force Fx versus position x for the spring-block arrangement of the second figure. The scale is set by F, = 190 N. We release the block at x = 14.0 cm. How much work does the spring do on the block when the block moves from x; = +9.0 cm to (a)x = +7.0 cm, (b) x = -7.0 cm, (c) x = -9.0 cm, and (d) x = -10.0 cm? -1 0 * (cm) x=0 Block F = 0 attached 90909000 to spring (a * positive F, negative . d -x-- * negative positive (0) (a) Number i Units (b) Number i Units v (c) Number Units v (d) Number i Units