help me ASAP, show all work , explain all step.

Jeff Poster is the proud Postmaster for Stinking Creek, Tennessee. The Post Office processes mail on a daily basis seven days a week, although the Post Office's service desk is not open for customers on Sunday. Each Sunday, after the Titans' game on the TV, Jeff ambles over to the Post Office (which sits about twenty paces from the back door of his deluxe double-wide), and he collects the mail slipped under the office's front door by the townspeople. For the past two weeks, Jeff has maintained careful records of the number of first-class mail items he has processed daily. His tabulations appear below: Day Sunday Monday Tuesday Wednesday Thursday Friday Saturday Week 1 Week 2 4 6 20 26 30 32 35 42 49 56 76 12 18 70 a) Please prepare a de-seasonalized time series forecasting model for this data. Express your forecasting model clearly as an equation. b) Use your forecasting model to develop daily forecasts for the coming week 3