20. (6 pts) John puts $50,000 into three investments form low to high risk: some in a 5% account, some in a 9% account and some in a 16% account. To avoid excess risk he invest three times as much in the 5% account as in the 16% account. He gets $4000 from his investments. How much did he invested in each account? Choose the variables, write the equations and STOP! NO SOLVING