Solve the all parts of given question:
Question: A capacitor is constructed of two concentric conducting cylindrical shells. The radius of the inner cylindrical shell is 2.42 x 10-3 m, and that of the outer shell is 2.55 x 10-3 m. When the cylinders carry equal and opposite charges of magnitude 1.85 x 10-10 C, the electric field between the plates has an average magnitude of 4.30 x 104 V/m and is directed radically outward from the inner shell to the outer shell.
Part A: Determine the magnitude of the potential difference between the cylindrical shells.
Part B: Determine the capacitance of this capacitor.
Please help for the above question, completely confused!! Show each steps if possible, Thanks.