Use a $3-$period weighted moving average forecast to calculate your forecast for September. Use $0\mathrm{.}7$ for the most recent period's weight, $0\mathrm{.}25$ for the next period's weight, and $0\mathrm{.}05$ for the most distant period's weight.$$

What is the mean absolute deviation $($MAD$)$ of your prediction? Round and enter your answer to one decimal place.