A boy kicks a ball horizontally over a boardwalk, with an initial horizontal speed of 7.00 m/s. A strong sea breeze gives the ball a constant horizontal acceleration of 11.0

m/s?. The ball falls into the water directly under the edge of the boardwalk, as shown in Figure A1.12. How high is the boardwalk above the water? Ignore the effect of air resistance on the vertical motion of the ball.