[tex]after\ first\ year:\\
6200+2,5\%*6200=6200+0,025*6200=6200+155=6355\$\\\\
after\ second\ year:\\6355+2,5\%*6355=6355+0,025*6355=6355+158,875=\\6513,875\$\\\\
after\ third\ year:\\
6513,875+2,5\%*6513,875=6513,875+0,025*6513,875=\\6513,875+162,846875=6676,721875\$\\\\
After\ 3\ years\ he\ will\ have\ 6676,721875\$.[/tex]