The question cannot be answered with the information given.
While you were reading through the problem, and hopefully pondering it for a moment or two before you decided to fish for answers on line, did you happen to notice the phrases "... the trajectory shown" and "The drawing ..." ? Those phrases refer to the picture that's right near the problem, wherever you copied it from. They're there in order to get the concept across that nobody would be expected to solve the problem without seeing the picture. Without that picture, we don't know what trajectory is shown, and we don't even know which distances are labeled 'x' and 'y' .
