yu put up 5,000$/yeer, 5.7%, kompound 1 per yeer
problem: interest formula assume yu put down $ on 1Jan & get interest at end
av kompound period=1 yeer heer.
So time span DONT inklude the paement at aej=21
paements at aej=10, 11,...20=11 yeers
kompounded gro tu 77,886.98$
then add in 5000$ for aej=21...82,886.98$