Please help me with this problem, thank you

Based on the Pizza Hut and Dominos' Duopoly competition as in question 3, If the game is being played repeatedly with uncertain final period, and both players have agreed to not extend their opening hours a. Do you think Pizza Hut need to comply with the agreement or can cheat by extending its operational hours? The interest rate i = 17% b. Calculate the level of interest rate when collusive agreement still can be maintain c. If there is a 65% chance that the government will end the opening hour limitation policy next year, do you think Pizza Hut need to cheat on the agreement