The membrane surrounding a living cell consists of an inner

Question

Solve the all parts of following question given below:

Question: The membrane surrounding a living cell consists of an inner and an outer wall that are separated by a small space. Assume that the membrane acts like a parallel plate capacitor in which the effective charge density on the inner and outer walls has a magnitude of 7.1e-6 C/m².

Part A: What is the magnitude of the electric field within the cell membrane?

Part B: Find the magnitude of the electric force that would be exerted on a potassium ion (K+; charge = +e) placed inside the membrane.

I need help to solve the above question.