physics need help?

Question

A hunter aims directly at a target (on the same level) 160 m away.
(a) If the bullet leaves the gun at a speed of 220 m/s, by how much will it miss the target?
___ m
(b) At what angle should the gun be aimed so the target will be hit?
___°

Answer 1

time to target is
t=S/V= 160/220 sec

during this time the bullet falls and this is the amount of error

h=(1/2) gt^2
h -error in height
g- acceleration due to gravity
t - time in flight or time to target

b) You have to provide a vertical component such as

Vv=gt

angle then
A= arcSin(Vv/V)