The wire of length l is available for making a circle and a square. How should the wire be divided between the two shapes to maximize the sum of enclosed area?
a) Divide it equally between the circle and the square.
b) Allocate 2/3 to the circle and 1/3 to the square.
c) Allocate 3/4 to the circle and 1/4 to the square.
d) Allocate 1/2 to the circle and 1/2 to the square.