Question 3 4 pts If marginal cost is lower than average cost (AC), average cost is Falling O None of these O Rising O ConstantQuestion 4 4 pts A firm sells 1,000 units per week. It charges $70 per unit, the average variable costs are $25, and the average costs are $65. In the short run, the firm should O Shut down as price is lower than average cost O Shut down as the firm is making a loss of $15,000 per week O Shut down because it is cost effective to pay off the remaining fixed costs Continue operating as the firm is covering all the variable costs and some of the fixed costsQuestion 10 4 pts If the current margin is greater than the desired margin O MR MCQuestion 12 4 pts Diseconomies of scale are also known as O Constant returns to scale O None of these O Decreasing returns to scale O Increasing returns to scale