A 14 nc point charge is at the center of a 16 m x 16 m x 16

Question

Solve the following question given below:

Question: A 14 nC point charge is at the center of a 1.6 m x 1.6 m x 1.6 m cube.

Question 1: What is the electric flux through the top surface of the cube?

N•m²/C

Please show all work and clearly explain to find the electric flux through the top surface of the cube.