Help! Completely and utterly stumped =(?

When baseball players throw the ball in from the outfield, they usually allow it to take one bounce before it reaches the infield, on the theory the ball arrives sooner that way. Suppose the angle at which a bounced ball leaves the ground is the same as the angle at which the outfielder threw it, but that the ball's speed after the bounce is one half what it was before the bounce. ume that the ball is always thrown with the same initial speed. At what angle should the fielder throw the ball to make it go the same distance D with one bounce as a ball thrown upward at 55.0� with no bounce? What's the ratio of the time invervals required for the one-bounce and no-bounce throws?