company is using exponential smoothing with trend to forecast the demand for a certain product. The smoothing constants are $\backslash$alpha $=0\mathrm{.}2$ and $\backslash$beta $=0\mathrm{.}1.$ MAD is updated with exponential smoothing with $\backslash$alpha $=0\mathrm{.}1.$ At the end of month $4$ the mean and trend were $220$ and $10,$ respectively, and MAD was $35.$ The demand in month $5$ is $250.$ Update forecast and MAD and estimate mean and standard deviation for the total demand during the three months $68.$