An oven, as shown in the left figure, is in the shape of a cube of side l. The surface of the base..

An oven, as shown in the left figure, is in the shape of a
cube of side l. The surface of the base is A1 = 0.1 m2. All other
surfaces have a combined surface area of A2 = 0.5 m2. Find the view
factor F21 and F22.