CAPM Leveraged Stock Return

Under the CAPM, the risk-free rate is 3% and the expected return of the market portfolio is 8%. A stock has beta 1.4. An investor with 100 dollars of own capital borrows another 50 dollars at the risk-free rate and invests the full 150 dollars in the stock.

What is the investor's expected return on their own 100 dollars of capital, as a decimal (for example 0.05 means 5%)?