really need help with how to choose a strategy

Question 3.6 Consider the pricing game below: Ici Cones Buy Gelato Buy Yogurt Machines Machines Gool Cones Buy Gelato $150. SO $150. $300 Machines Buy Yogurt $400. $150 $50, $50 Machines a) Is there a dominant strategy for each firm? If yes, what is it, and explain why. If not, explain why not. b) If the firms must choose their prices simultaneously, is there a pure strategy equilibrium? Justify your answer. c) If Gool moves first, what will be its payoff in equilibrium