A stock has a beta of $1\mathrm{.}28$ and an expected return of $12\mathrm{.}6$ percent. A risk$-$free asset

currently earns $4\mathrm{.}2$ 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 $\mathrm{.}88,$ 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 $11\mathrm{.}8$ percent, what is its beta?

$($Do not round intermediate calculations and round your answer to $2$ decimal

places, e$.$g$.,32\mathrm{.}16.)$

d$.$ If a portfolio of the two assets has a beta of $2\mathrm{.}48,$ what are the portfolio weights? $($A

negative answer should be indicated by a minus sign. Do not round intermediate

calculations and round your answers to $4$ decimal places, e$.$g$.,\mathrm{.}1616.)$