Given the following data, develop a demand forecast for period $7$ using a $4-$period weighted moving average, with weights of $0\mathrm{.}15,0\mathrm{.}25,0\mathrm{.}25,$ and $0\mathrm{.}35,$ where $0\mathrm{.}35$ is used for the most recent week.

$\backslash$table$[[$Period$,1,2,3,4,5,6],[$Demand$,8,11,5,12,16,9]]$

The forecast for period $7$ using the $4-$period weighted moving average is $($enter your response rounded to two decimal places$).$