A charter flight charges a fare of $200 per person, plus $4 per person for each unsold seat on the plane. If the plane hold 100 passengers and if x represents the number of unsold seats, find the following:

A. an expression for the total revenue received for the flight(hint: multiply the number of people flying,100-x,by the price per ticket)

B. the graph for the expression in part (a)

C. The number of unsold seats that will produce the maximum revenue

D. The maximum revenue