Ed Lawrence has OMR100,000 invested. Of that, OMR30,000 is invested in IBM stock, OMR25,000 is invested in T-bills, and the remainder is invested in corporate bonds. Which of the following is ?true regarding his portfolio a. Ed has 30% of his portfolio invested in stocks O b. If IBM has a beta less than one, the portfolio has a beta O -greater than one .c. Ed has 70% of his portfolio invested in risk-free assets O .d. Ed has 55% of his portfolio invested in corporate bonds O e Changes in the return on IBM stock will have the greatest impact on changes in the portfolio return