slove the question please

Q: An investor has $120,000 and wants to invest it entirely in a portfolio consisting of stocks (A, B) and the risk-free asset F. If he wants to achieve a return from the portfolio =13.2, provided that the portfolio risks ; are 70% of the market risks. If RA=30, = BA=1.6,RB=20%,B=1.52, and R=4. What is required: Determine the amount to be invested in stock (A) and how do you explain your