Find the maximum height H to whioch she rises above the end of the track.?

The drawing shows a skateboarder moving at 6.80 m/s along a horizontal section of a track that is slanted upward by 54.4 � above the horizontal at its end, which is 0.791 m above the ground. When she leaves the track, she follows the characteristic path of projectile motion. Ignoring friction and air resistance, find the maximum height H to whioch she rises above the end of the track.