Can you show me a simple step by step please

2. The cost to produce x teddy bears per day at the Cuddly Companion Co. is calculated by their marketing staff to be given by the formula C(x) = 100 + 42x - 0.03x2 a. Find the average cost function C and evaluate C (100) (include units with C (100)). b. Find the marginal cost function C'(x) and evaluate C'(100) (include units with C'(100)). in c. Use your answers to parts (a) and (b) to determine if the average cost increasing or decreasing when they produce 100 teddy bears