9. Production of a certain item has a fixed cost of $1.500 and an additional cost of $7.50 per unit. The selling price is $9.25 per unit. Let I represent the number of items produced. (a) Write the cost function C(). (3 pts) [3 pts] (b) Write the revenue function R(x). [4 pts) (c) Find the fewest number of items that must be produced and sold to realize a profit. Total for Question 10 Let f(x) = 1x1