Your aunt has $$640,000$ invested at $5\mathrm{.}5\%,$ and she now wants to retire. She wants to withdraw $$45,000$ at the beginning of each year, beginning immediately. She also wants to have $$50,000$ left to give you when she ceases to withdraw funds from the account. For how many years can she make the $$45,000$ withdrawals and still have $$50,000$ left in the end?

$27\mathrm{.}37$

$22\mathrm{.}63$

$19\mathrm{.}74$

wer

$24\mathrm{.}15$

if you could show me how to do this with the BA II plus that would be great.