4. Portfolio manager Tim has one thousand dollars to invest. His client needs him to create a well-diversified portfolio. Tim wants to choose Stock A, B, C and a risk free asset to build up his portfolio. He will invest $250 in stock A with a beta of 0.89; 5200 in stock B with a beta of 1.28. He estimates the beta of Stock C is 1.25. The portfolio beta should be (6) How much should Tim invest in risk free asset? 17) (in $, two decimal places)