write me the information that I need to input into excel solver to calculate this Question $($set objective, by changing variable cells, subject to constraints$)$;

$8.$ Assuming that the risk$-$free rate is $3\%$ per year and that short sales are not allowed,

$($a$)$ what is the lowest standard deviation you can attain for a portfolio with the same expected return as your original portfolio?

$($b$)$ what is the highest expected return you can attain for a portfolio with the same standard deviation as your original portfolio?

Please report weights as well as expected returns and standard deviations of these two portfolios.