You are planning to save for retirement over the next $30$ years. To do this, you will invest $$500$ a month in a stock account and $$200$ a month in a bond account. The return of the stock account is expected to be $11$ percent, and the bond account will pay $6$ percent. When you retire, you will combine your money into an account with a return of $9$ percent.

How much can you withdraw

month from your account assuming a $20-$year withdrawal period?

a$.$ $$173,088\mathrm{.}87$

b$.$ $$507,304\mathrm{.}12$

c$.$ $$14,712\mathrm{.}55$

d$.$ $$14,135\mathrm{.}59$

e$.$ $$14,424\mathrm{.}07$