If required, round your answers to the nearest dollar. If an amount is zero, enter "0".

a. Erwin and Eleanor are married and file a joint tax return. They have adjusted gross income of $42,000, no tax-exempt interest, and $14,700 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.

b. Assume Erwin and Eleanor have adjusted gross income of $15,400, no tax-exempt interest, and $16,940 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.

c. Assume Erwin and Eleanor have adjusted gross income of $103,000, no tax-exempt interest, and $15,450 of Social Security benefits. As a result, $ of the Social Security benefits are taxable.