This is one question but has 5 parts to it abcde

2. A 15 kg dumbbell is held 1.8 meters from the ground. a. How much work was involved to lift it from the floor? b. How much work is required to hold the dumbbell? c. How much potential energy does it have being held ? d. If it is dropped how much kinetic energy does it have 0.5 meters from the ground? e. If it is thrown downward with an initial velocity of 4 m/s, what will its velocity be 0.3 meters from the ground