Physics Projectile Motion problem?

Emmanuel Zacchini launched as a human cannonball soared over three ferris wheels each 18.0m high covering a horizontal distance of 10.63m. (A)uming that the point of projection is 2.5m above the ground and that he landed safely on a net placed at the same level, find his initial velocity. (B) uming that he misses the net and landed on the ground, with what velocity will he strike the ground?