Hello, I am having issues solving these questions, I would really appreciate some help and explanation!

Remember Orchid Relief product produced by Eli Orchid from previous mini-projects. The product is designed to improve the night sleep, so the company is guessing that sales of the product is somewhat related to sleeping pattern of customers over the days of the week. Before mass production of the product, Eli Orchid has market tested Orchid Relief in only Orange County over the past 8 weeks. The weekly demand is recorded and provided below. The following graph also shows how daily demand changed over time. Eli Orchid is now trying to use the sales pattern over the past 8 weeks to predict sales in US for the upcoming few weeks, especially for days 57 and 60. An accurate forecast would be much helpful in arrangements for the company's production processes and design of price promotions over each week.

Daily Demand 500 450 400 AA 350 300 250 0 10 20 30 40 50 60