A Girl of Mass 55 Kg Throws a Ball

A girl of mass 55 kg throws a ball of mass 0.80 kg against a wall. The ball strikes the wall horizontally with a speed of 25 m/s, and it bounces back with this same speed. The ball is in contact with the wall 0.050 s. What is the magnitude of the average force exerted on the wall by the ball?

A) 400 N
B) 13,750 N
C) 55,000 N
D) 800 N
E) 27,500 N