A mass of 0.079 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 3.80 m/s.(a) While the mass moves downward a distance of 0.11 m, how much work was done on the mass by the Earth? Include the appropriate sign. Work done by Earth = J(b) At the instant in part (a) when the mass has moved downward a distance of 0.11 m, the speed of the mass has decreased to 1.52 m/s. How much work was done on the mass by the spring? Include the appropriate sign. Work done by spring = J