International city trust( ICT) invest in short-term trade credits, corporate bonds, gold stocks, and construction loans. To encourage a diversified portfolio, the board of directors has placed limits on the amount that can be committed to any one type of investment. ICT has $5 million available for immediate investment and wishes to do two things: (1) maximize the interest earned on the investment made over the next si months and (2) satisfy the diversification requirements as set by the board of directors. The specification of the investment possibilities are as ??