d) What is Liza's long-run average total cost for 15 orders per week? Please explain why this short-run average total cost of producing 15 orders per week when the number of mixers is fixed at 3 is greater than her long-run total average cost of producing 15 orders per week.Question 4 Liza owns a small bakery company catering for gourmet cakes and pastries. Her fixed cost is the cost of the mixer and baking tools, while variable costs include flour, sugar, eggs, and edible decorations. Contemplating business expansion, she is trying to decide how many commercial mixers to purchase and came out with the following projections: Quantity of Mixers Variable Cost (RM) Fixed Cost (RM) 15 orders 30 orders 45 orders 2 6,000 2,000 5,000 12,000 7,000 1,800 3,800 10,800 4 8,000 1,200 3,600 8,400