Compute the taxable SS benefits in the following situations:

1. Edward and Emily are married and file a joint tax return. they have adjusted gross income of $46,000 no tax exempt interest, and $12,400 of SS benefits.

2. Edward and Emily have adjusted gross income of $12,000 no tax exempt interest, and $16,000 of SS benefits.

3. Edward and Emily have adjusted gross income of $85,000 no tax exempt interest and $15,000 of SS benefits.

Please explained in a detailed way and show how you got the numbers.