Please help?!?!

Question 8 (Challenging) Consider the market for donuts which is characterised by the following demand curve: P = 30 Q where Q is in dozens. There are two suppliers for donuts, Mike and Norman who each have the same marginal cost of $2 per dozen donuts and no fixed cost. a) If they collude (i.e. act together as a monopoly) how many donuts will they collectively sell and at what price? b) Draw Mike and Norman's profits in a payoff matrix. c) What is the Nash Equilibrium of this game? d) Draw a new payoff matrix showing Mike and Norman's profits per month. e) What is the new Nash Equilibrium of the game