7. Consider a four-month sales and operations planning problem with the monthly demand data shown in the table below. Every plan should start at end of December) and end (at end of April) with 10 employees, and every plan should start at the beginning of January) and end (at the end of April) with 50 units of inventory. Each employee makes 10 units per month and cach hire costs $2000 and each layoff (firing) costs $1000. Production Inventory Month January February March April Demand (units) 200 260 240 300 (2 pts.) a) How many employees would there be in March for Level plan? Number of Employees in March for Level plan (2 pts.) b) What would be the cost for hiring and firing for a Level plan? Cost for hiring and firing - (3 pts.) c) What would be the total inventory (summed over the 4 months) for a Level plan? Total inventory (over the 4 months) = (2 pts.) d) How many employees would there be in March for Chase plan? Number of Employees in March for Chase plan