(a) Using four-month moving average method compute the measures of forecasting accuracy over the test periods 11-30.

(b) Use single exponential smoothing and compute the measures of forecasting accuracy over the test periods 11-30 for = 0.2 and = 0.4

dont use excel ( paper work ) please

16 5 6 119 22 176 Question 1 The data in the following table show the daily sales of paperback books and hardcover books at the same store. The task is to forecast the next four days' sales for paperbacks and hardcover books. Day Paperbacks Hardcovers Day Paperbacks Hardcovers 1 199 139 243 240 2 172 128 17 225 189 3 111 172 18 167 222 4 209 139 19 237 158 161 191 20 202 178 168 21 186 217 7 195 170 261 8 195 145 23 232 238 131 184 24 195 240 10 183 135 25 190 214 11 143 200 12 141 198 27 222 201 13 230 217 283 14 201 222 29 188 220 15 155 206 30 259 (a) Using four-month moving average method compute the measures of forecasting accuracy over the test periods 11-30. (6) Use single exponential smoothing and compute the measures of forecasting accuracy over the test periods 11-30 for a = 0.2 and a = 0.4 9 218 26 182 168 28 247