Assume personal income was $28 million last year. Personal outlays were $20 million and personal current taxes

Question:

Assume personal income was $28 million last year. Personal outlays were $20 million and personal current taxes were $5 million.
a. What was the amount of disposable personal income last year?
b. What was the amount of personal saving last year?
c. Calculate personal saving as a percentage of disposable personal income.