please solve all the question to get a thumbs up. thanks.

Q3. (Total 25 points) Goodyear Tire and Rubber Company is the ninth largest tire manufacturer in the world. Here are the sales revenues for year 1 through year 5 : a. When might a manager prefer linear trend technique to simple moving average technique? Explain your answer. (5 points) b. Based on MAD for from year 3 to year 5, which method (linear-trend or double exponential smoothing method with =0.4 and =0.2 (start with initial estimates S1 =$4,867.90 and T1=$201.5 for the year 1)) provides the better forecasts? Explain. Forecast the sales revenue for year 6 and year 7 based on your preferred method (20 points)