9. You have the following information for three portfolios in a two-factor economy: Asset Expected Return (%) Beta on Factor 1 Beta on Factor 2 Portfolio A 15 1.4 1.1 Portfolio B 12 1.2 0.9 Portfolio C 18 1.2 0.5 There is a risk-free asset with a return of 2%. Is there an arbitrage opportunity? How can investors take advantage of it? (You can either use algebraic solutions by solving three weights or to use the solver in EXCEL to solve this question, by setting the weights of Portfolio A, B, C and risk-free asset as the changing variables, with three constraints on the total weights and the beta loadings on Factor 1 and 2 to be zero.)