Mr. and Mrs. K file a joint income tax return. Assume the taxable year is 2017.

Compute their standard deduction assuming that Mr. K is age 68, and Mrs. K is age 60.

Compute their standard deduction assuming that Mr. K is age 70, and Mrs. K is age 68.

Compute their standard deduction assuming that Mr. K is age 70, and Mrs. K is age 68. Mrs. K is legally blind.