Your portfolio is made up of R50 000 invested in a share with a beta of 1,8,R100000 invested in a share with a beta of 0,8 , and R150 000 invested in a share with a beta of 1,2. The risk-free interest rate is 7%. This portfolio last year had a required rate of return of 13%. This year, nothing has changed except for the fact that the market risk premium has increased by 2 percent (two percentage points). What is the portfolio's current required rate of return