Answer:
In the year 2020 --- Not taxable Hence -Nil
In the year 2050----Taxable. Hence $5000
Explanation:
Assumed that the tax payer purchased the annuity from Tax paid Income'.
In this case the tax payers income of $5000 is partly taxable . That is the percentage of the payment that's considered a return on your initial investment will not be taxable. the rest, which is your gain on the investment, will be taxed. In this case for the first twenty years($100000/$5000) =20 years will not be taxable. Hence
In the year 2020 --- Not taxable Hence -Nil
In the year 2050----Taxable. Hence $5000