Portfolio beta and weights

Brandon is an analyst at a wealth management firm. One of his clients holds a $$7,500$ portfolio that consists of four stocks. The investment allocation in the portfolio along with the contribution of risk from each stock is given in the following table:

$\backslash$table$[[$Stock$,$Investment Allocation,Beta,Standard Deviation$],[$Atteric Inc. $($AI$),35\%,0\mathrm{.}750,38\mathrm{.}00\%$