Demand for a power steering gear assembly is given by

Currently there are $40$ parts on hand. The lot$-$sizing rule is fixed order period using two periods. Lead time

is four periods.

a$.(2)$ Determine the planned order release schedule for the gear

b$.(3)$ Suppose each gear assembly requires two pinions. Currently there are $175$ pinions on

hand, the lot$-$sizing rule is lot$-$for$-$lot, and the lead time is one period. Determine the gross

requirements and then the planned order release schedule for pinions.