Initial Investment Cash Flow
Project A $42 million $24 million per year or three years
Project B $36 million $18 million per year or three years
Project C $30 million $12 million per year or three years
Project D $24 million $9.0 million per year or three years

An investor has a budget of $60 million. He can invest in the projects shown above. If the cost of capital is 4%, what investment or investments should she make?