Question: The National Credit Union has $250,000 available to invest in a 12-month commitment. The money can b e placed in Treasury notes yielding an 8 % return or municipal bonds yielding an average rate of return of 9%. Credit union regulations require diversification to the extent that at least 50% of the investment be placed in Treasury notes. Because of defaults in such municipalities as Cleveland and New York, it is decided that no more than 40% of the investment be place in bonds. Formulate as a linear programming problem.