You have $36,000 you would like to invest in two different stocks, stock boll and stock coff. the buying limit on stock coff is $12,900 and you want to spend at least four times as much money on stock boll as stock coff. if stock boll earns 5% annual interest and stock coff earns 4% annual interest, how much money (in dollars) should you invest in each stock to maximize your annual interest earned? what is the maximum annual interest (in dollars)?