please answer question 14 with details

no pictures format

cast. USE U U .L. c. What is the forecast for the next month? The following time series shows the sales of a particular product over the past 12 months. 14. Month Month Sales 105 135 120 105 90 120 Sales 145 140 100 80 100 110 a. Construct a time series plot. What type of pattern exists in the data?! b. Use a = 0.3 to compute the exponential smoothing values for the time series. c. Use trial and error to find a value of the exponential smoothing coefficient a that results in a relatively small MSE. waaks of data on the Commodity Futures Index are 7.35, 7.40, 7.55, 7.56,7,60,7.52