Use the sales data provided in the Excel Sheet to find the sales forecasting as follows:

$1-3$ months and $5$ months moving average forecasting.

$2-3$ months and $5$ months weighted moving average forecasting considering the following weights $(0\mathrm{.}2,0\mathrm{.}3,0\mathrm{.}5)$ for the $3$ months weighted moving average and $(0\mathrm{.}2,0\mathrm{.}3,0\mathrm{.}4,0\mathrm{.}5,0\mathrm{.}6)$ for the $5$ months weighted moving average. $($note highest weight is given to the recent value$)$