A mass of 0.078 kg hangs from a vertical spring in the lab room. You pull down on the mass and throw it vertically downward. The speed of the mass just after leaving your hand is 6.00 m/s. (a) While the mass moves downward a distance of 0.10 m, how much work was done on the mass by the Earth? Include the appropriate sign. b) At the instant in part (a) when the mass has moved downward a distance of 0.10 m, the speed of the mass has decreased to 3.78 m/s. How much work was done on the mass by the spring? Include the appropriate sign.