In this problem, p is in dollars and x is the number of units. The demand function for a product is 10 P= x+2 If the equilibrium quantity is 4 units. Set up the integral for the consumer's surplus. Cs =/ D(x) dx - px PS = px - S(x) dx 0 0 O a. 10/6 10 dx 0 x+2 Ob. 10/6 10 dx - 4 10 0 x +2 6 O c. 10 10 4 dx 0 x+2 O d. . 4 10 dx - 4 10 0 x+2 6