The Rio Credit Union has $250,000 avalable to invest in a 12 -month commitment and wants to invest all of k. The money can be placed in Brazilian treasury notes yielding an 896 return or in riskier high-yeld bends at an average rate of teturn of 99 . Credit union regutations require diversificition to the exnem that at least tons of the investment be ptaced in Treasury notes, It is also decided that no more than 40% of the investment be placed in bonds. The aim of the objective function for Pio Credt Union should be to the cojective value. The optimal ROH occurs when: 5 invested in Treasury notes = (enter your response as a whole number)