Problem $1-$ Forecasting

The following data is the actual electricity generated in Hawaii for the years of $2016-2021($in gigawatt hours$).$ source: Hawaii's Electricity Industry: $2021-2022$ Analysis and Recent Trends

Using the $3$ different methods suggested, prepare a forecast for the years of $2019-2021.$

$\backslash$table$[[$Year$,$GWh of electricity,MA$(3)$ Forecast,WMA Forecast weights of $5,1$ for $D_{t-1}$ and $D_{t-2},$ respectively,$\backslash$table$[[$Exponential$],[$Smoothing with $=0\mathrm{.}3$