please solve using excel solver

Al Ferris has $70,000 that he wishes to invest now in order to use the accumulation for purchasing a retirement annuity in five years. After consulting with his financial advisor, he has been offered four types of fixed-income investments, which we will label as investments A, B, C, and D. Investments A and B are available at the beginning of each of the next five years (call them years 1 to 5). Each dollar invested in A at the beginning of a year returns $1.40 (a profit of $0.40 ) two years later (in time for immediate reinvestment). Each dollar invested in B at the beginning of a year returns $1.70 three years later. Investments C and D will each be available at one time in the future. Each dollar invested in C at the beginning of year 2 returns $1,90 at the end of year 5 . Each dollar invested in D at the beginning of year 5 returns $1.30 at the end of year 5 . Click here for the Excel Data File Formulate and solve a linear programming model for this problem on a spreadsheet. a. Which investment plan maximizes the amount of money that can be accumulated by the beginning of year 6 ? Note: Leave no cells blank. Enter " 0 " wherever required. b. Determine the ending balance at Year 5 . \begin{tabular}{|c|c|c|c|c|c|c|c|c|c|} \hline Beginning Balance & $70,000 & & & & & & & & \\ \hline Minimum Balance & $5,000 & & & & & & & & \\ \hline Investment & A & A & A & A & B & B & B & C & D \\ \hline Year & 1 & 2 & 3 & 4 & 1 & 2 & 3 & 2 & 5 \\ \hline Year 1 & -1 & & & & -1 & & & & \\ \hline Year 2 & & -1 & & & & -1 & & -1 & \\ \hline Year 3 & 1.4 & & -1 & & & & -1 & & \\ \hline Year 4 & & 1.4 & & -1 & 1.7 & & & & \\ \hline Year 5 & & & 1.4 & & & 1.7 & & & -1 \\ \hline Year 6 & & & & 1.4 & & & 1.7 & 1.9 & 1.3 \\ \hline ested & & & & & & & & & \\ \hline \end{tabular}