A stock has a beta of 1.23 and an expected return of 12.1 percent. A risk-free asset currently earns 3.95 percent. a. What is the expected return on a portfolio that is equally invested in the two assets? Note: Do not round intermediate calculations and enter your answer as a percent rounded to 2 decimal places, e.g., 32.16. b. If a portfolio of the two assets has a beta of 83 , what are the portfolio weights? Note: Do not round intermediate calculations and round your answers to 4 decimal places, e.g., 1616. c. If a portfolio of the two assets has an expected return of 113 percent, what is its beta? Note: Do not round intermediate calculations and round your answer to 2 decimal places, e.9. 32.16. d. If a portfolio of the two assets has a beta of 2.43. what are the portfolio weights? Note: A negative answer should be indicated by a minus sign. Do not round intermediate calculations and round your answers to 4 decimal places, e.g. 1616