A) If a bulls-eye target is at a horizontal distance R away, derive an expression for the

Question:

A) If a bulls-eye target is at a horizontal distance R away, derive an expression for the height L, which is the vertical distance above the bulls-eye that one needs to aim a rifle in order to hit the bulls-eye.
Assume the bullet leaves the rifle with speed v0.
B) How much bigger is L compared to the projectile height H?
Note: In this problem use previous results found for the range R and height H, namely