A long, thin straight wire with linear charge density λ runs down the center of a thin, hollow metal cylinder of radius R. The cylinder has a net linear charge density 2λ. Assume λ is positive.

Part A

Find expressions for the magnitude of the electric field strength inside the cylinder, r
Express your answer in terms of some or all of the variables R, r, and the constant π.

Part B

Find expressions for the magnitude of the electric field strength outside the cylinder, r>R. Give your answer as a multiple of λ/r.

Express your answer in terms of some or all of the variables R, r, and the constant π.

Please show detail answers including unit conversion i get it confused thanks !