Irene's Dairy is deciding whether or not to enter the market for ice cream, currently monopolized by Mattie's Ice-cream. If it enters the market, Mattie's can either accommodate him and share his 10million in profits equally with Irene or fight him and cause a 5million loss for each in a price war.​ In a sequential game, given Mattie's best response function, what would Irene's best response be?
1. Explain the economic usefulness of Porters Five Forces Model.