Question 4 (2 points) dC 1 4+21 Find the cost function for the marginal cost x 10 and fixed cost a) C() - +21x+2,800 O b) C() - -1 45+2.8007 + 21 c CO - --2+217+2,800 "d) C()=+2,800x +21 el C() =x+21x +2,800Question 4 (2 points) dC 1 4+21 1 for the marginal cost dx 10 and fixed cost of $2,800 (for x = 0). O a) C(x) = 40 x6+ 21x + 2,800 Ob) c(x) = x5 + 2,800x +21 50 O c) C(x) = x5+21x +2,800 O d) c(x) = x6+2,800x +21 O e) c(x) = x 1x6+21x + 2,800