A Point Charge Sits in the Center of a 1

A point charge sits in the center of a 1 m cube.The electric flux through one side of the cube is 7.2 * 10¹⁰ Nm²/C.What is the charge at the center of the cube?

A) 3.5 C
B) 4.6 C
C) 8.9 C
D) 6.0 C
E) 3.8 C