When you purchased your$$ house, you took out a $3030-$year $$annual$-$payment mortgage with an interest rate of $10\%10\%$ per year. The annual payment on the mortgage is $$$$9$ comma $0009,000.$ You have just made a payment and have now decided to pay the mortgage off by repaying the outstanding balance.

a$.$ What is the payoff amount if you have lived in the house for $1616$ years$($so there are $1414$ years left on the$$ mortgage$)?$

b$.$ What is the payoff amount if you have lived in the house for $2424$ years$($so there are $66$ years left on the$$ mortgage$)?$

c$.$ What is the payoff amount if you have lived in the house for $1616$ years$($so there are $1414$ years left on the$$ mortgage$)$ and you decide to pay off the mortgage immediately before the $1616$th payment is$$ due? Assume the same payment of $$$$9$ comma $0009,000$ per year and an interest rate of $10\%10\%$ per year.