$8-7$ PORTFOLIO REQUIRED RETURN Suppose you are the money manager of a $$4\mathrm{.}82$ million investment fund. The fund consists of four stocks with the following investments and betas:

$\backslash$table$[[$Stock$,$Investment,Beta$],[$A$,$$$460,000,1\mathrm{.}50],[$B$,500,000,(0\mathrm{.}50)$