How much mass could a 350 N force cause to accelerate at the rate of 7.2 m/s² ?

At the same instant in time, from a height of 5 ft above the ground - a rock is dropped from rest, a slingshot fires a pellet horizontally at a speed of 25 ft/s, a bow launches an arrow horizontally with a speed of 250 ft/s, and a rifle fires a bullet horizontally at a speed of 2500 ft/s. List the projectiles, in order of which object hits the ground first, second, third, and fourth. Ignore air resistance.

A) Dropped rock

B) Slingshot pellet

C) Arrow

D) Bullet

Please explain in detail and show your work, thank you so much!