Hello! I am trying to solve this problem, but I have no clue how to do it. I think it involves derivatives, but I am unsure. Smartshop Electronics company has a weekly production cost of z widgets that is given by C(z) = 0.000004z 3 - 0.03z 2 + 100z + 75,000 *** z is in the interval [0, 10,000]. The demand function for this product is given by p(z) = -0.005z + 200. What is the: a: marginal cost for Smartshop Electronics b: marginal revenue for Smartshop Electronics c: marginal profit for Smartshop Electronics when 2,000 & 7,000 TV widgets are made