In one contest at the county fair, a spring-loaded plunger launches a ball at a speed of 4.00 from one corner of a smooth, flat board that is tilted...

In one contest at the county fair, a spring-loaded plunger launches a ball at a speed of 4.00 from one corner of a smooth, flat board that is tilted up at a 20 angle. To win, you must make the ball hit a small target at the adjacent corner, 2.05 away. At what angle should you tilt the ball launcher?