If the center of the ping-pong ball is to clear the net as shown, at what height h shoul...

If the center of the ping-pong ball is to clear the net as shown, at what height h should the ball be horizontally served? Also determine h₂. The coefficient of restitution for the impacts between ball and table is e = 0.9, and the radius of the ball is r = 0.75 in.