Conceptualquestions on portfolio and stand$-$alone risk

Manuel holds a $$5,000$ portfolio that consists of four stocks. His investment in each stock, as well as each stock's beta, is listed in the following table:

Suppose all stocks in Manuel's portfolio were equally weighted. The stock that would contribute the least systematic risk to the portfolio

is

$..$ Further, if all of the stocks in the portfolio were equally weighted, the stock that would have the

least amount of unsystematic risk is

If the risk$-$free rate is $4\mathrm{.}00\%$ and the market risk premium is $6\mathrm{.}50\%,$ then Manuel's portfolio will exhibit a beta of

and a required return of