Two flat surfaces are exposed to a uniform, horizontal magnetic field of magnitude 0.52 T. When viewed edge-on, the first surface is tilted at an angle of 13 degree from the horizontal, and a net magnetic flux of 7.50 x 10-3 Wb passes through it. The same net magnetic flux passes through the second surface.
(a) Calculate the area of the first surface.
(b) Determine the smallest possible value for the area of the second surface.