Find the steady-state temperature in the region between two spheres r=1 and r=2 if the surface of the outer sphere has its upper half held at 100∘ and its lower half at −100∘ and these temperatures are reversed for the inner sphere. Hint: See Problem 7.14. Here you will need to find two Legendre series (when r=1 and when r=2) and solve for al and bl.