A stock has a beta of $1\mathrm{.}55$ and an expected return of $15$ percent. A risk$-$free asset currently earns $2\mathrm{.}2$ percent.

a$.$ What is the expected return on a portfolio that is equally invested in the two assets? $($Do not round intermediate calculations and enter your answer as a percent rounded to $2$ decimal places, e$.$g$.,32\mathrm{.}16.)$

b$.$ If a portfolio of the two assets has a beta of $\mathrm{.}93,$ what are the portfolio weights? $($Do not round intermediate calculations and round your answers to $4$ decimal places, e$.$g$.,\mathrm{.}1616.)$

c$.$ If a portfolio of the two assets has an expected return of $8$ percent, what is its beta? $($Do not round intermediate calculations and round your answer to $3$ decimal places, e$.$g$.,32\mathrm{.}161.)$

d$.$ If a portfolio of the two assets has a beta of $3\mathrm{.}10,$ what are the portfolio weights? $($A negative answer should be indicated by a minus sign. Do not round intermediate calculations.$)$

$\backslash$table$[[$a$.$ Expected return,,$\%$