Projectile data
Projectile motion for initial height = 1m, g = 9.81 ms
-2
Units: velocity ms
-1, angle degrees, time seconds, range m, height m.

Further projection velocities follow.

Formulae used to calculate these values:
Maximum Height reached = u
2sin
2A/2g + 1
Horizontal motion: Distance travelled = ucosA t
Vertical motion: h-1 = usinAt – ½ gt
2Initial velocity u, angle of projection A, time t, height h
To make the problem a little simpler is assumed that the muzzle of the gun is always 1m above the ground no matter what the angle of the gun.