Suppose the population's income increases, shifting the demand curve to the right. Now the demand curve for tangelo oranges becomes Q subscript d equals 4000 minus 2 P. spaceThe supply curve remains the same, Q subscript s equals 3 P. The new equilibrium price and quantity in the market are: a. P equals 800 comma space Q equals 2400. b. P equals 2200 comma space Q equals 1100. c. P equals 500 comma space Q equals 500. d. P equals 100 comma space Q equals 250