The following two demand sets are to be used to test two different basic exponential smoothing models. The first uses an $\backslash$alpha of $0\mathrm{.}1$ while the second uses an $\backslash$alpha of $0\mathrm{.}5.$ In both cases the model should be initialised with a beginning forecast of $50,$ that is the ESF forecast for Period $1$ made at the end of Period $0$ is $50$ units. In each of the four cases $($two models on two demand sets$)$ compute the average forecast error and MAD. What do the results mean? Note: Feel free to use Excel to solve this assignment if required.