>>16831815
I love this shit

Find maximum flying distance: delta y = 0 since the projectile will be on the ground, solve for time (one is t=0, disregard) , plug the other time solution into delta x

Find the highest rise: a) symmetry argument - since its a parabola the highest rise occurs on the second time solution from above - halved -
Plug that halved time solution into delta y

b) velocity in y direction is 0 in the highest rise, solve for t and plug it into delta y