9. You need to rent a car and compare the charges of threedifferent companies. Company A charges 20 cents permile plus $20 per day. Company B charges 10 cents permile plus $35 per day. Company C charges $70 per daywith no mileage charge.(a) Find formulas for the cost of driving cars rentedfrom companies A, B, and C, in terms of x, thedistance driven in miles in one day.(b) Graph the costs for each company for 0 ≤ x ≤ 500.Put all three graphs on the same set of axes.(c) What do the slope and the vertical intercept tell youin this situation?(d) Use the graph in part (b) to find under what circum-stances company A is the cheapest. What aboutCompany B? Company C? Explain why your re-sults make sense.