Solve all given parts of following problem:
Problem: A point charge Q = 4.20×10-6 C is at the center of a conducting spherical shell of radius R = 18.40 cm. The total charge of the shell is -4.20×10-6 C.
Part A: What is the field in the region between the point charge and the shell?
Part B: What is the field just outside the shell?
Please show work I think I have the answer just not positive.