Answer:
9.62%
Explanation:
Re = Rf + (B x Rp)
Re = cost of equity = 9.775%
Rf = risk free rate = 4%
B = beta = 1.05
Rp = risk premium = ?
Rp = (Re - Rf) B = (9.775% - 4%)/1.05 = 5.5%
Re portfolio = Rf + {Rp x [(B₁ x $5/$5.5) + (B₂ x $0.5/$5.5)]}
Re portfolio = 4% + {5.5% x [(1.05 x $5/$5.5) + (0.75 x $0.5/$5.5)]}
Re portfolio = 4% + {5.5% x [0.9545 + 0.0682]}
Re portfolio = 4% + 5.6249% = 9.62%