Plzzz help me with the following question.

5. Members of a high school choir want to attend a national contest. After a signup. the choir director stated that the trip will cost $400 per choir member plus a $1500 fee for the choir to participate. [ 10 marks ] a) Write an equation to represent the total average cost of the trip per choir member. b) What is the horizontal asymptote of the function? What does it mean in relationship to this problem? What is the vertical asymptote? What does it mean in relationship to the problem. c) Find the total average cost of the trip if 45 members attended. d) How many members must attend to bring the total average cost to $425 per member. e) Graph the function