Fire a projectile horizontally from the edge of a vertical cliff 20.7 m above the ground, with an initial speed of 48.0 m/s. The projectile lands 71.4 m away from the base of the cliff. What is the value of g for planet 37?

a. 18.71 m/s²
b. 9.36 m/s²
c. 383.92 m/s²
d. 26.56 m/s²