A stock has a beta of $0\mathrm{.}9$ and an expected return of $19$ percent.

A risk$-$free asset currently earns $5\mathrm{.}0$ percent.b$.$If a portfolio of the two assets has a

beta of $0\mathrm{.}44,$ what are the portfolio weights?$($Do not

round intermediate calculations. Enter your answers as a percent

rounded to $2$ decimal places.$)$c$.$If a portfolio of the two assets has an

expected return of $10\mathrm{.}50$ percent, what is its

beta?$($Do not round intermediate

calculations.Round your answer to $4$ decimal

placesd.$$If a portfolio of the two assets has a

beta of $1\mathrm{.}21,$ what are the portfolio weights?$($A

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

intermediate calculations.$$Enter your answers

as a percent rounded to $2$ decimal

places.$)$