Note: Round the intermediate values and the final answer to $2$ decimal places

The mean squared error $($MSE$)$ for this forecast is $\_\_\_\_\_\_\_\_\_\_\_.$Exhibit $1$: for questions $10-11$

A time series with forecast values and error terms is presented in the following table.

$\backslash$table$[[$Month$,$Actual,Forecast$],[$July$,5,],[$Aug$,11,5],[$Sept$,13,6\mathrm{.}8],[$Oct$,6,8\mathrm{.}66],[$Nov$,5,7\mathrm{.}862]]$

Note: Round the intermediate values and the final answer to $2$ decimal places

The mean squared error $($MSE$)$ for this forecast is