The equations for this projectile motion is written in the picture attached.
a.) For this part, you use the last equation. In here, you will need the initial velocity and the launch angle. There seems to be missing information about that. Let's just suppose that the initial velocity is 5 m/s and the launch angle is 30° above the horizontal.
R = (5 m/s)²(sin2*30°)/9.81 m/s² = 2.207 m
b.) You use the first equation for this part.
t = 2(5 m/s)(sin 30°)/9.81 m/s² = 0.51 seconds
