A monopoly seller faces a demand curve ? (?) = 120 - 4p. The cost is ?(?) = 2 +02 a) Write down the profit as a function of quantity and check that the second order condition is satisfied. A monopoly seller faces a demand curve ? (?) = 120 - 4p. The cost is ?(?) = 2 +02 a) Write down the profit as a function of quantity and check that the second order condition is satisfied