A 1.80-kg rock is released from rest at a height of 18.0 m. Ignore air resistance and determine(a)the kinetic energy at 18.0 m,(b)the gravitational potential energy at 18.0 m,(c)the total mechanical energy at 18.0 m,(d)the kinetic energy at 0 m,(e)the gravitational potential energy at 0 m, and(f)the total mechanical energy at 0 m.