For the next 3 questions, consider a four-month sales and operations planning problem with the monthly demand data shown in the table below. Every plan should start and end with 3 employees and should start (at the beginning of May) and end (at the end of August) with 10 units of inventory. Each employee makes 20 units per month and each hire costs $1000 and each layoff (firing) costs $500. 6.12 (3 pts.) How many employees would there be in July for Level plan? a) 2 . b) 3 . c) 4 . d) 5 . e) none of the above 6.13 (3 pts) What would be the total inventory (summed over the 4 months) for a Level plan? a) 40 b) 50 c) 60 d) 70 e) none of the above For the next 3 questions, consider the forecast and actual demand shoum tal........ past 5 weeks. 6.8 (3 pts.) What is the MAD for the forecast? a) 1 b) 4.6 c) 5 d) 9 c) none of the above. 6.9 (2 pts.) What is the mean squared error (MSE) for the forecast? a) 21.16 b) 21.4 c) 35 d) 81 e) none of the above. 6.10 (3 pts.) In which range is the MAPE for the forecast? a) 22%. For the next 3 questions, consider a four-month sales and operations planning problem with the monthly demand data shown in the table below. Every plan should start and end with 3 employees and should start (at the beginning of May) and end (at the end of August) with 10 units of inventory. Each employee makes 20 units per month and each hire costs $1000 and each layoff (firing) costs $500. 6.12 (3 pts.) How many employees would there be in July for Level plan? a) 2 . b) 3 . c) 4 . d) 5 . e) none of the above 6.13 (3 pts) What would be the total inventory (summed over the 4 months) for a Level plan? a) 40 b) 50 c) 60 d) 70 e) none of the above For the next 3 questions, consider the forecast and actual demand shoum tal........ past 5 weeks. 6.8 (3 pts.) What is the MAD for the forecast? a) 1 b) 4.6 c) 5 d) 9 c) none of the above. 6.9 (2 pts.) What is the mean squared error (MSE) for the forecast? a) 21.16 b) 21.4 c) 35 d) 81 e) none of the above. 6.10 (3 pts.) In which range is the MAPE for the forecast? a) 22%