Peter is going to put up 5 walls in the tree house. Each wall will be 7 feet high and 7 feet across. He wants to leave room for windows that measure 2 feet by 2 feet. Which algebraic expressions will give the total square feet of lumber he will need for the walls if n represents the number of windows he puts in? Choose all that apply. 241n 49n – 4 49n – 4n 245 – 4n 49(5) – 4n (7)(7)(5) – 4n (7)(7)(5) – (2)(2)n