While scrambling directly toward the sideline, the football quarterback Q throws a pass toward the stationary receiver

Question:

While scrambling directly toward the sideline, the football quarterback Q throws a pass toward the stationary receiver R. At what speed v_Q should the quarterback run if the direction of the velocity of the ball relative to the quarterback is to be directly down the field as indicated? The speed of the ball relative to the quarterback is 60 ft/sec. What is the absolute speed of the ball? Treat the problem as two-dimensional.