You are going to order some blank recordable DVD discs. The shipping for your entire order will be $6.49, and the discs come in 100 packs which sell for $25. (a) Letting n represent the number of 100 packs purchased, write a function C(n) that represents the average cost per disc for your order. Be sure to include the shipping charge in your cost calculations. С (п) — (b) Using the function you found in part (a), write an equation to determine the minimum number of 100 packs that must be purchased in order that the average cost per disc is equal to $0.2534. (c) Determine the minimum number of 100 packs that must be purchased in order that the average cost per disc is less than $0.2534.