7 Problem 7 The inverse demand curve for product X is given by: Pa = 25-0.005Q +0.15Py where Pr represents price in dollars per unit, Q represents rate of sales in pounds per week, and Py represents selling price of another product Y in dollars per unit. The inverse supply curve of product X is Pr = 5 + 0.004Q (a) Determine the equilibrium price and sales of X. Let P = 10. (b) Draw a graph to illustrate your answers. (c) Determine whether X and Y are substitutes or complements. N