Could you please help with scinario below? Assume you are $30$ years of age. Your salary next year is assumed to be $$25,000.$ Assume your salary is expected to grow at a steady rate of $4\mathrm{.}5\%$ per year until you retire at age $60.$

A$.$ If the appropriate discount rate is $9\mathrm{.}5\%$ APR, what is the PV of your future salary payments? For simplicity, assume each salary payment is received at the end of each year.

B$.$ If you save $5\%$ of your salary each year and invest these savings at an interest rate of $9\mathrm{.}5\%$ APR, how much will you have saved by age $60?$

C$.$ Assume that you plan to withdraw an equal amount at the end of each year for the first $20$ years of your retirement. Assuming that after the last withdrawal this retirement account balance is zero, how much can you withdraw? Assume a $9\mathrm{.}5\%$ APR during retirement also. thanks