$.$ Conceptualquestions on portfolio and stand$-$alone risk

Van holds a $$10,000$ portfolio that consists of four stocks. His investment in each stock, as well as each stock$$s beta, is listed in the following table:

Stock

Investment

Beta

Standard Deviation

Andalusian Limited $($AL$)$ $$3,5001\mathrm{.}0012\mathrm{.}00\%$

Tobotics Inc. $($TI$)$ $$2,0001\mathrm{.}3011\mathrm{.}00\%$

Water and Power Co$.($WPC$)$ $$1,5001\mathrm{.}1020\mathrm{.}00\%$

Mainway Toys Co$.($MTC$)$ $$3,0000\mathrm{.}4019\mathrm{.}50\%$

Suppose all stocks in Van$$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 $6\mathrm{.}00\%$ and the market risk premium is $8\mathrm{.}50\%,$ then Van$$s portfolio will exhibit a beta of and a required return of $.$