Solve the all parts of given question:
Question: A flat surface with area 2.4m2 is in a uniform electric field of 820N/C.
Part A: What is the electric flux through the surface when it is at right angles to the field?
Part B: What is the electric flux through the surface when it is at 45 degrees to the field?
Part C: What is the electric flux through the surface when it is parallel to the field?
Please show solution step by step with details for above question.