im not sure if my answers for a and b are right. Please help

Suppose Intel stock has a beta of 0.89, whereas Boeing stock has a beta of 1.28. If the risk-free interest rate is 6.4% and the expected return of the market portfolio is 10.4%, according to the CAPM, a. What is the expected return of Intel stock? b. What is the expected return of Boeing stock? c. What is the beta of a portfolio that consists of 55% Intel stock and 45% Boeing stock? d. What is the expected return of a portfolio that consists of 55% Intel stock and 45% Boeing stock? (There are two ways to solve this.) a. What is the expected return of Intel stock? Intel's expected return is 16.36%. (Round to one decimal place.) b. What is the expected return of Boeing stock? Boeing's expected return is 11.52 %. (Round to one decimal place.) c. What is the beta of a portfolio that consists of 55% Intel stock and 45% Boeing stock? The portfolio beta is (Round to two decimal places.) d. What is the expected return of a portfolio that consists of 55% Intel stock and 45% Boeing stock? (There are two ways to solve this.) The expected return of the portfolio is 1%. (Round to one decimal place.)