What is your forecast for Week $7$ based on a $4-$week weighted moving average approach with weights of $0\mathrm{.}6$ for the most current week, and $0\mathrm{.}1$ for the oldest week, and a weight of $0\mathrm{.}1$ for Week $5?$

$\backslash$table$[[$Week$,$Income$],[1,650],[2,700],[3,720],[4,800],[5,740],[6,780],[7,]]$

$774$

$757$

$760$