Long-Run Competitive Equilibrium Market demand is given by D(p) = 100 – ½p, all firms in the market have the following long-run cost function C(y) = y² +9. a) Find the firm's supply function, yi (p). b) Find the equilibrium price, p*. c) Find the equilibrium firm and market quantity, yi and y*. d) Find the equilibrium number of firms, n*.