Please help me answer these asap, confused for HW

(26 points) An industry is composed of two firms (firms A and B). The inverse demand curve is p(X) = 122-2X, where X is total output in the industry (and the output of the two firms will be called A and TB). Each firm has constant marginal cost MC = c1 = 2 and there is no fixed cost. All assumptions of the Cournot model apply. (a) Write down the profit function of each firm and then find their best response func- tions.(b) Find the equilibrium level of total output in this industry and the equilibrium price