Please answer 1 and 2, give steps and show how to fill in the spreadsheet

A trust officer at the Blacksburg National Bank needs to determine how to invest $150,000 in the following collection of bonds to maximize the annual return. The officer wants to invest at least 40% of the money in short-term issues and no more than 20% in high-risk issues. At least 25% of the funds should go in tax-free investments, and at least 45% of the total annual return should be tax free. 1. Formulate the LP model for this problem. 2. Create the spreadsheet model and use Solver to solve the problem. Ob.FunMAX.095A+.08B++99C+09D+09EA+B+C+D+E=100000B+E?a4(A+B+C+D+E)A+D+Ecos;2(A+B+C+B+E)A+B+D3=25(A+B+C+D+E).095A+0.B+09D>=0.45(0.095A+0.08D+0.09C+0.09D+0.00E)