What Is the Beta of a Portfolio Comprised of the Following

What is the beta of a portfolio comprised of the following securities? $\begin{array}{lll} \underline{\text { Stock } }& \begin{array}{l}\text { Amount } \\ \underline{\text { Invested }}\end{array} & \begin{array}{l}\text { Security } \\ \underline{\text { Beta }}\end{array} \\ \text { A } &\$ 2,000 & 1.20 \\\mathrm{~B} & \$ 3,000 & 1.46 \\\text { C } & \$ 5,000 & .72\end{array}$

A) 1.008
B) 1.014
C) 1.038
D) 1.067
E) 1.127