According to the CAPM, rank the expected return of the following portfolios in a descending order $($from

highest to lowest$).$

X$.$ portfolio with a standard deviation of $2\mathrm{.}2$ and beta of $0\mathrm{.}98$

Y$.$ portfolio with a standard deviation of $3\mathrm{.}4$ and beta of $1\mathrm{.}12$

Z$.$ diversified portfolio with returns similar to the overall market