A Bullet is fired from a Gun with a Muzzle Velocity whoes Horizontal Component is 100Ms and whoes Vertical Component is 200Ms

(A) How long does the Bullet take to reach its Highest point.
(B) What is it Velocity and Acceleration at the Highest Point?

This is all a vertical problem

a = -g = -9.81 m/s^2
v = Vinitial - 9.81 t
at top v = 0
9.81 t = 200
t = 200 / 9.81
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vertical velocity = 0 at top and horizontal velocity has not changed, still 100 m/s
the acceleration is still g of course, about -9.81 m/s^2