solve for a,b,c and d

Suppose intel stock has a beta of 073 , whereas Boeing stock has a beta of 1:21 If the risk-free interest rate is 48% and the expecled refum of the market portfolio is 124%; according to the CAPM, a. What is the expected return of intel stock? b. What is the eipected return of Eloeing stock? c. What is the beta of a portfolio that consats of 55% intel stock and 45% Boevo stock? d. What is the expected return of a porffolio that consiats of 55% intel atock and 45% Boeing stock? (There are two ways to solve this.)