Miniature Golf Course Problem

In the figure below, B is a ball and H is a hole in a miniature golf course. Let's assume the ball always bounces off smooth straight walls so that the angle of incidence always equals the angle of reflection, a) In this problem, we want the ball to start at B, then bounce off the bottom wall at some point P so that the angle of incidence equals the angle of reflection, then land at H. Show to find this point P along the bottom wall.