Heres my questions I hope you can give me the correct answers thankyouu

The Costello Music Company has been in business for five years. During that time, the sales of electric organs have grown from 12 units in the first year to 76 units the most recent year. The firm owner, wants to develop a forecast of organ sales for the coming year based on the historical data shown. Year 1 2 3 4 5 Sales 12 28 34 50 76 a. Graph this time series. Does a linear trend appear? b. What is the equation for the linear trend component for the time series? *use Ft=at +b form, where a is the slope and b is the y-intercept c. What is the average increase in sales per year for the firm? unitsConsider the following time series data _QUarbEr_ Yeah _ Yea: _ Year; 1 _',I_'1_ __ 68 _ 62 J _ 49 _ 41 _ 51 _3_ _ 58 _ 6n _ 53 4 78 B1 . 72 1. Construct a time series plot. In each year the low-vest value occurs in what Quarter? E the highest? \\:| 2. Use a multiple regression model with dummy variables as follows to develop an equation to account for seasonal effects in the data. Qtn :1 if Quarter 1_. o otherwise; Qtn : 1 if Quarter 2, 0 otherwise; Qt|3 : 1 if Quarter 3. 0 otherwise. Compute the quarterly forecasts for next year. Year 4 Forecast Round off a newer to '2 decimal places Sales of Comfort brand headache medicine for the past ten weeks at Rosco Drugs are 110, 115, 125, 120, 125, 120, 130, 115, 110, and 130. If Rosco Drugs uses exponential smoothing to forecast sales, which value for the smoothing constant a, 0.1 or 0.8, gives better forecasts? What is the forecast for the 11 week? *round off answer to two decimal places