A stock has a beta of $1\mathrm{.}4$ and an expected return of $16$ percent. A risk$-$free asset currently earns $4\mathrm{.}0$ percent.

a$.$ What is the expected return on a portfolio that is equally invested in the two assets? $($Do not round intermediate calculations. Enter your answer as a percent rounded to $2$ decimal places.$)$

b$.$ If a portfolio of the two assets has a beta of $0\mathrm{.}14,$ 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 $13\mathrm{.}00$ percent, what is its beta? $($Do not round intermediate calculations. Round your answer to $4$ decimal places.$)$

d$.$ If a portfolio of the two assets has a beta of $1\mathrm{.}45,$ 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.$)$