2) [30 pts] By using following data, answer the below questions. Time Loans It Forecast 120 124 119 3 137 4 122 149 165 150 8 180 9 187 10 216 11 213 12 236 a) [10 pts] Calculate estimations by using SES (Simple exponential Smoothing) (it is enough to show 2 cases). Choose smoothing parameter alpha as 0.5. b) [20 pts] By using R, answer followings: I. Fit a model by using simple exponential smoothing and find the fitted values (estimation of original values). II. Find smoothing parameters III. Forecast next 2 values IV. Fit a model by using Holt method and find the fitted values (estimation of original values)