a$.$ Tyler and Candice are married and file a joint tax return. They have adjusted gross income of $$40,400$ before considering their Social Security benefits, no tax$-$exempt interest, and $$14,140$ of Social Security benefits. As a result, $fill in the blank $1$

of the Social Security benefits are taxable.

b$.$ Assume Tyler and Candice have adjusted gross income of $$17,200$ before considering their Social Security benefits, no tax$-$exempt interest, and $$18,920$ of Social Security benefits. As a result, $fill in the blank $2$

$0$

of the Social Security benefits are taxable.

c$.$ Assume Tyler and Candice have adjusted gross income of $$116,500$ before considering their Social Security benefits, no tax$-$exempt interest, and $$17,475$ of Social Security benefits. As a result, $fill in the blank $3$

of the Social Security benefits are taxable.