We have to calculate how much is the annual premium per week
[tex]\frac{12658}{1\text{ year }}(\frac{1\text{ year}}{52\text{ weeks}})\text{ = }\frac{12658}{52}=\text{ \$243.42}[/tex]If the employer deducts the 50% from her paycheck, then
243.42 (0.5) = $121.71