An incline makes an angle of 21.7o with the horizontal. A 7.42 kg block is given a push up this incline and released. It starts at the bottom with initial speed 9.15 m/s, travels up the incline, stops, and slides back to the bottom at final speed 6.90 m/s. Using energy considerations, find:
a) the energy used to overcome friction traveling up and down the incline.
b) the distance the block traveled up along the incline before coming momentarily to rest.
c) The coefficient of kinetic friction between the block and the incline.