subject: Investment

4. Investor Liu will invest one hundred million dollars into three instruments for one year. Firstly, Liu bought debt A. The original quantity of debt is 1 million and unit price is 10 dollars. After 1 year, the unit price of debt A is 12 dollars. Secondly, Liu bought the stock B with unit price 40 dollars and the quantity is 1 million. After 1 year, the unit price of stock B has been increased to 50 dollars. Thirdly, Liu bought the stock C with unit price 25 dollars and the quantity is 2 million. After 1 year, the unit price of stock C has been decreased to 20 dollars. After 1 year, If Liu sold up the debt A, stock B and stock C, find the total group rate of return for investment? If the inflation rate is 4%, What is the final real rate of return? (25 points)