Can you please write down the LP model equations for this question? In anticipation of the immense college expenses, Joe and Jill started an annual investment program on their child's eighth birthday that will last until the eighteenth birthday. They plan to invest the following amounts at the beginning of each year:To avoid unpleasant surprises, they want to invest the money safely in the following options: Insured savings with $7\mathrm{.}5\%$ annual yield, $6-$year government bonds that yield $7\mathrm{.}9\%$ and have a current market price equal to $98\%$ of face value, and $9-$year municipal bonds yielding $8\mathrm{.}5\%$ and having a current market price of $1\mathrm{.}02$ of face value. How should the money be invested?