A company using a level production policy has the following demand for six periods: Period 1234 2 3 4 5 6 Demand 8 6 14 6 9 5 With a zero starting inventory balance, determine the following: a. The level production rate that will result in a zero iriventory balance after period 6. b. The inventory and back orders per period with the production rate in period 4. c. The level production rate that would eliminate back orders.