Problem $3-6($Algo$)$

The following tabulations are actual sales of units for six months and a starting forecast in January.

a$.$ Calculate forecasts for the remaining five months using simple exponential smoothing with $\backslash (\backslash$alpha$=0\mathrm{.}4\backslash ).$ Note: Round your answers to the nearest whole number.

b$.$ Calculate the MAD for all the forecasts, including January's.

Note: Round your answer to $1$ decimal place.

MAD