Your company has $45,000 in cash to make an investment. He has asked the company's financial director to structure at least 4 investment opportunities to make a decision on it. The director has told you that the possibilities are as shown below. With these data, what is the optimal investment portfolio for the company? Remember that the company's market interest rate is 12% as shown on all investments.

1. Invest in a zero coupon bond from the European Central Bank. This bond was issued in dollars for a face value of 10,000. You do not know the price at which you could buy the bond, but you know that the market rate is 12%. The maturity period of this bond is 10 years.

2. Invest in a construction project for an office tower, the value of the investment is 12.5 thousand dollars and it will rent a biennial effective 14% (every two years) with annual capitalizations for 10 years. The redemption value (sale) of this investment in year 10 will be 17.5 thousand dollars and the opportunity interest rate in your company to calculate your NPV is 12%.