Three Masses Are Located as Follows: a 3

Multiple Choice

Three masses are located as follows: a 3.5-kg mass is at the origin, a 4.2-kg mass at (0.0 m, 7.0 m) , and a 6.5-kg mass at (24.0 m, 0.0 m) . What is the gravitational energy of the system of masses?
G = 6.67 x 10^-11 N·m²/kg².

A) -2.8 × 10^-10 J
B) -2.0 × 10^-10 J
C) -1.4 × 10^-10 J
D) -3.2 × 10^-10 J
E) -3.9 × 10^-10 J