c$)$ Using the $3-$year weighted moving average with weights $0\mathrm{.}20,0\mathrm{.}30,$ and $0\mathrm{.}50,$ using $0\mathrm{.}50$ for the most recent period, provide the forecast from periods $4$ through $12($round your responses to two decimal places$).$

$\backslash$table$[[$Year$,4,5,6,7,8,9,10,11,12],[$Forecast$,,,,,,,,,$