Assume now that there is no sales mix constraint but that the other constraints remain unchanged. a. If there is no required sales mix, what is the optimal production plan? [1.5 marks) b. Using the contribution margin format, build an income statement based on this optimal production plan. Indicate the income in your executive summary; and put the statement in appendix ofyour report. 'r'our income statement should show the contribution margin of each product. {1 mark] Willett Limited Willett Limited manufactures three products with the characteristics shown in the following table. Product 2 3 Total Selling Price (per unit) 550 $30 $80 Variable Cost (per unit) 20 12 50 Required Sales Mix 30% 60% 10% Maximum Sales (units) 100,000 200,000 50,000 Use of capacity (hours) 2 1.5 3 Total Capacity Hours Available 455,000 Total Fixed Costs $4,000,000