I have posted the given question and conditions in the attached image
(Q_enclosed/ epsilon_0) = closed integral (E-field) dA
Q_encolsed = p*A
V(r)= -Int_(from origin to r) (E-field(r'))*dl'
The Attempt at a Solution
(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.