M&L Manufacturing, Forecasting Case. help

The problem is the Case Study called M&L Manufacturing. It
appears in the Forecasting chapter, suggesting that it is a problem in
Forecasting. You need to read the chapter to understand the methods and
objectives of forecasting, so that you can select the right method. The work is
done in Excel. Submit one Excel file containing both the work and the
interpretation.

Here is the file that has the problem and the questions. Remember submit one Excel file containing both the work and the interpretation.

Please if you are not sure how to do it just tell me 

Let me know if you have any questions.