0 kg snowboarder has an initial velocity of 6.00 m/s at the top of a 26 degree incline. after sliding down the 100m incline with coefficient of...

a 70.0 kg snowboarder has an initial velocity of 6.00 m/s at the top of a 26 degree incline. after sliding down the 100m incline with coefficient of kinetic friction .200 the snow boarder obtained a velocity v at which point he moves along a horizontal field with a coefficient of kinetic friction .140 and stops. what is the net work done on the snow boarder during his trip down the hill and what is his velocity at the bottom of the hill?