Delvin is practicing free throw shots. After a jump, Delvin releases the basketball from a height of 8 feet (ft) above the ground. When the ball is 2 ft horizontally from Delvin, it is 11 ft in the air. The ball then passes through the basket, which is 10 ft above the ground and 15 ft horizontally from Delvin. What is the maximum height that the basketball reaches in its path? You can assume that the ball travels in a parabolic arc, as shown in the figure.
