Step by step please not sure what I'm doing wrong

(a) Find the marginal cost function C'(x). C'(x) = 37 -0.04x (b) How fast is the cost going up at a production level of 100 teddy bears? When they produce 100 teddy bears, the production costs are increasing at a rate of 33 dollars per teddy bear In other words, the cost to produce the |101st vv teddy bear is approximately X dollars (c) Find the average cost function C, and evaluate C(100). C( x ) = X C(100) = X So when they produce 100 teddy bears, the average cost per teddy bear is X dollars. (d) Fill in the blanks: Since the marginal cost is Select One-- v the average cost per unit, increasing production from 100 teddy bears will cause to -Select One- - v x