Answer:
a. Adjusted Gross income is calculated as;
= Wages + Interest - Deduction
= 41,000 + 700 - 5,000
= $36,700
b. The couple will pick their Standard deduction in 2019 because its more than the itemized deduction.
Standard deduction for couples in 2019 = $24,400
c. I assume you mean their 2019 taxable income which is;
= Adjusted Gross income - Standard deduction
= 36,700 - 24,400
= $12,300
Note; As of 2018 there are no more personal deductions.