Could someone PLEASE help me with these physics questions? please show work, I WILL RATE GOOD

Now that we have a better feel for the symmetry of the problem, let's return to two concentric insulators with uniform volume charge density p > 0 for inner one and -p for the outer one, separated by a neutral insulator. If we were to slice the system in half the interior would look like: R3 (7) What is f E . dA on that surface in terms of E, r and L? (8) What is Qenc in terms of p, r, and L? (Hint: recall the volume of a cylinder is arz L.) (9) First determine the electric field inside the positively charged insulator for r