i need help on this question.

Suppose Farmer Bridget's total cost of producing B bushels of bananas is described by the equation TC = 40+ 2B2. (3 points each part) a. What is an equation for Farmer Bridget's average xed cost curve? Is it increasing or decreasing with bushels of output? Explain. b. What is an equation for Farmer Bridget's average variable cost curve? As bushels of output increase is it increasing at a decreasing, constant, or increasing rate? Explain. c. What is an equation for Farmer Bridget's marginal cost curve? As bushels of output increase is it increasing at a decreasing, constant, or increasing rate? Explain. d. What is an equation for Farmer Bridget's average total cost curve? At What level of output (that is, at what value of B) is average total cost minimized