Create a forecast for Week $11$ using a $3-$week weighted moving average with weights of $0\mathrm{.}7$ for the most current week, and $0\mathrm{.}1$ for the oldest week.

$\backslash$table$[[$Week$,$Income$],[1,980],[2,1040],[3,1240],[4,1020],[5,860],[6,960],[7,1080],[8,1380],[9,1360],[10,1100],[11,]]$

$1182$

$1174$

$1176$

$1180$