Question

A person of mass M lies on the floor doing leg raises. His leg is 0.85m long and pivots at the hip. Treat his legs (including feet) as uniform cylinders, with both legs comprising 34.5% of body mass, and the rest of his body as a uniform cylinder comprising the rest of his mass. He raises both legs 40∘ above the horizontal.

1)How far does the center of mass of each leg rise?
2)How far does the entire body's center of mass rise?