Problem $8\mathrm{.}07($Portfolio Required Return$)$

Suppose you are the money manager of a $$4\mathrm{.}44$ million investment fund. The fund consists of four stocks with the following investments and betas:

$\backslash$table$[[$Stock$,$Investment,Beta$],[$A$,$$$320,000,1\mathrm{.}50],[$B$,600,000,(0\mathrm{.}50)$