The forecast for month $2$ will be the observed value from month $1.$ The forecast for month $3$ will be the average of the observed values from months $1$ and $2.$ The forecast for month $4$ will be the average of the observed values from months $1,2,$ and $3.$

Complete the column of forecast values using this method.

$\backslash$table$[[$Month$,$Value,Forecast Value$],[1,17,17],[2,25,\frac{17+25}{2}=$