i need help answering questions a,b, at the very bottom. i really dont understand this from my homework

A retailer experiences a seasonal demand pattern for its services. Labor requirements over a typical six-month period follow.

Period	1	2	3	4	5	6
Requirement	7	8	9	11	12	7

Costs associated with operations are as follows:

Wages = $2,000 per worker per month

Hiring cost = $1,000 per worker

Layoff cost = $1,500 per worker

Use the following table as a template to complete the necessary calculations. (Make necessary changes when needed)

	1	2	3	4	5	6	Total
Inputs
Forecasted demand
Workforce level
Undertime
Overtime
Vacation time
Subcontracting time
Backorders
Derived
Utilized time
Inventory
Hires
Layoffs
Calculated
Utilized time cost
Undertime cost
Overtime cost
Vacation time cost
Inventory holding cost
Backorders cost
Hiring cost
Layoff costs
Subcontracting cost
Total cost

The current workforce level is 10 workers. Use the spreadsheet approach and the preceding data to answer the following questions:

a. What is the total cost of a staffing plan, including the cost of regular wages, hiring, and layoffs using a chase strategy with hiring and layoffs, but no overtime?

b. What is the total cost of the staffing plan, using a level strategy in which no overtime is allowed and the undertime paid for?

c. Suppose that overtime is allowed up to 25% of the regular-time capacity, and that overtime wages are 150% of the regular-time rate. What is the total cost of the level strategy with overtime and undertime that also minimizes undertime?