Stock ABC has a beta of 0.75 . The risk-free rate is 3% per year and the expected return of the market portfolio is 9% per year. According to the capital asset pricing model, what is the expected return, per year, of stock ABC ? Round all intermediate calculations to 6 decimal points. Your final answer should be within 0.05% of the correct answer choice. 9.75%7.50%4.50%6.75%