answers with explanation please

Problem 2) Electric field of a uniformly charged spherical shell [40 points] Consider a thin spherical shell of radius R centered at the origin 0 and carrying total charge Q distributed uniformly over its surface. a) Write down the expression for the electric field, E(r) , for a point r outside the spherical shell. Hint: It is not required to derive the result. A brief justification of the answer is sufficient. b) What is the electric field E(r ) for a point r inside the spherical shell? Justify your