8. Four friends throw a party for their school's basketball team. To have enough food for the whole team, each friend buys 1 medium pizza, 2 orders of breadsticks, and 1 salad. Let p represent the price of 1 medium pizza. Let b represent the price of 1 order of breadsticks. Let s represent the price of 1 salad. All prices are in dollars. a. Write two different expressions that represent the total amount of money the friends spend. Explain how each expression describes the situation in a different way. b. The party is running out of food, so another friend orders 1 medium pizza and 1 salad. Write an expression to represent the total cost of all the food after this order.