Suppose Intel stock has a beta of $0\mathrm{.}77,$ whereas Boeing stock has a beta of $1\mathrm{.}21.$ If the risk$-$free interest rate is $3\mathrm{.}3\%$

and the expected return of the market portfolio is $13\mathrm{.}6\%,$ 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 $60\%$ Intel stock and $40\%$ Boeing stock?

d$.$ What is the expected return of a portfolio that consists of $60\%$ Intel stock and $40\%$ Boeing stock? $($There are two

ways to solve this.$)$