5.27 In a given region of space, the vector magnetic potential is given by A = $5 cos xy + 2(2 + sin xx) (Wb/m). (a) Determine B. (b) Use Eq. (5.66) to calculate the magnetic flux passing through a square loop with 0.25-m-long edges if the loop is in the x-y plane, its center is at the origin, and its edges are parallel to the x- and y-axes. (c) Calculate d again using Eq. (5.67)