4. Lupe is the manager of the football team, and she has to plan a team dinner for Saturday night. She knows that one large pizza can feed 3 players and one sandwich tray can feed 4 players. Lupe needs to order enough food for the72 players on the team.

(a) Write a linear equation to represent the number of pizzas (x) and the number
of sanwgh trays (y) she could purchase to feed the football players.

(b) Suppose the football players want to order exactly 16 pizzas. How many trays
of sandwiches must Lupe buy to feed all of the football players?