A stock has a beta of 1.75 and an expected return of 12 percent. A risk-free asset currently earns 3 percent. a. What is the expected return on a portfolio that is equally invested in the two assets? (Do not round Intermedlate calculations. Enter your onswer as a percent rounded to 2 declmal ploces, e.g., 32.16.) b. If a portfolio of the two assets has a beta of .98 , what are the portfolio weights? (Do not round Intermedlete calculetlons. Round your answers to 4 declmal pleces, e.g., 32.1616.) c. If a portfolio of the two assets has an expected return of 9 percent, what is its beta? (Do not round Intermedlete calculetlons. Round your onswer to 3 declmal pleces, e.g., 32.161.) d. If a portfolio of the two assets has a beta of 3.50, what are the portfolio weights? (Do not round Intermedlate calculations. Negatlve amounts should be Indleated by a minus sign. Enter your answers as a whole number.)