Robert wants to install windows in a bus barn to improve the airflow in the summer months. if robert makes his own screens, he can save money. to have screen material to fold over the window frame, robert needs to cut 5 1/2 foot by 5 1/2 foot squares. the back wall by the offices requires four windows. for a good cross-flow of air, robert will build five windows on each of the ohter two walls of the barn. how many square inches of screen will be needed for all of the windows?