Helped needed with projectile motion given only angle and x/y distance

[TheLunchGun]

1. A physics professor did daredevil stunts in his spare time. His last stunt was an attempt to jump across a river on a motorcycle. The takeoff ramp was inclined at 53.0 degrees, the river was 40.0 m wide, and the far bank was 15.0 m lower than the top of the ramp. The river itself was 100 m below the ramp. You can ignore air resistance.

a. What should his speed have been at the top of the ramp for him to have just made it to the edge of the far bank?

b. If his speed was only half the value found in (a), where did he land?

This problem has been a thorn in my side for many an hour. Some help would be great if anyone has some time.

 

[Theorem.]

What work have you done so far? Where are you getting stuck?

 

[TheLunchGun]

I've tried a number of different angles on it but nothing seems to go anywhere. I actually already have the answers, but I want to know the method of solving it. I can post them if needed.