A sandwich store charges a delivery fee to bring lunch to an office building. One office pays $33 for 4 turkey sandwiches. Another office pays $61 for 8 turkey sandwiches. a. How much does each turkey sandwich add to the cost of the delivery? b. How much is the delivery fee? c. Write an equation to represent this situation (let y be the total cost and x be the number of sandwiches). Make sure you answer each part of the problem in the essay box below. Identify each part of your answer.