In Fig. 5-46 (P5.32), the plane defined by x y = 1 separates medium 1 of permeability

Question:

In Fig. 5-46 (P5.32), the plane defined by x y = 1 separates medium 1 of permeability μ1 from medium 2 of permeability μ2. If no surface current exists on the boundary and B1 = x2 + y3 (T),
Find B2 and then evaluate your result for μ1 = 5μ2. Hint: Start out by deriving the equation for the unit vector normal to the given plane.