A firm's fixed costs are 180 and the variable costs are 3Q per unit. Based on this information, choose the correct statements (more than one option might be correct). A None of the other options is right. B Marginal Cost function follows the expression MC=3Q D Total Cost function follows the expression TC=180+30 180 Average cost function follows the expression AC = Q Minimum Average Cost happens for Q= 180 3 +6 The approximate total cost of manufacturing the next unit after Q1 follows the expression 3Q1