A store's employees receive a 25% discount on all purchases. During a promotion, all items in the store were reduced by $10. Let x be the original price of an item. a. Determine a function, E(x), that represents the purchase price when only the employee discount is applied. b. Determine a function, C(x), that represents the purchase price when only the promotional discount is applied. c. Determine E(C(x)) and C(E(x)). d. Explain what each function in c. represents. Which is the better deal for an employee?