Solve the all parts of following problem:
Problem: An infinite, non conducting sheet has a surface charge density is +9.78pC/m2.
Part A: How much work is done by the electric field due to the sheet if a particle of charge q0 = 9.61 x 10-19 C is moved from the sheet to a point P at distance d = 4.98 cm from the sheet?
Part B: If the electric potential V is defined to be zero on the sheet, what is V at P?
Please show me step by step or type in formulas used. I am so lost!!