1. The problem statement, all variables and given/known data I have posted the given question and conditions in the attached image 2. Relevant equations (Q_enclosed/ epsilon_0) = closed integral (E-field) dA Q_encolsed = p*A V(r)= -Int_(from origin to r) (E-field(r'))*dl' 3. The attempt at a solution a) E=0------>For r<a (p*v)/(epsilon_0) = pi*(a^2)*L*E E= ((p*v)/(epsilon_0))*(1/(pi*(a^2)*L)------>For the solid inside's edge r=a E= 0-------> Between soild inside's edge and the outer shell's edge (Q_out = -Q_in) a<r<b (Q_enclosed)/(epsilon_0) = 2pi*b*L*E E= ((Q_enclosed)/(epsilon_0))*(1/(2pi*b*L))-------For the outer shell's edge r=b b)As for potential, V, I am very uncertain as to what I should do. c) I think this portion will be much clearer once a) and b) are clearified. Thanks!