A man has $10,000 to invest. He invests $4000 at 5% and $3500 at 4%. In order to have a yearly income of $500, he must invest the remainder at:
<spanclass=′latex−bold′>(A)</span>6%<spanclass=′latex−bold′>(B)</span>6.1%<spanclass=′latex−bold′>(C)</span>6.2%<spanclass=′latex−bold′>(D)</span>6.3%<spanclass=′latex−bold′>(E)</span>6.4%