Can you please provide the explanation, formula and correct answer for the problem above?

Thanks,

The expected rates of return for Stocks Aand B are .06 and .12 respectively. The risk free rate is 04 and the market risk premium is 06. If you inest 96,000 and 54,000 in 510cks A and B respectively what is the beta of the pertfolo? Assume that the 2 stocks are priced in equilibrium. Select one a 75 b 65 C 55 d. 45 e 1