If the range of the projectile is 239 m the time-of-flight

Question

If the range of the projectile is 2.39 m, the time-of-flight is T = 0.919 s, and air resistance is turned off, determine the following.

(a) What is the launch angle of the projectile?

(b) What is the initial speed of the projectile?

(c) Express the maximum height reached by the projectile in terms of g and T (the time-of-flight).