1.A trust officer at the Blacksburg National Bank needs to determine how to invest $100,000 in the following collection of bonds to maximize the annual return

Bond Annual Return Maturity Risk Tax-Free

A 9.50% Long High Yes

B 8.00% Short Low Yes

C 9.00% Long Low No

D 8.75% Long High Yes

E 9.10% Short High No

The officer wants to invest at least 40% of the money in short-term bonds and no more than 30% in high-risk bonds. At least 60% of the funds should go in tax-free investments. The officer's goal is to maximize annual return.

Write down the linear program.