Your investment portfolio consists of $10,000 worth of Google stock.Suppose that the risk-free rate is 4%, Google stock has an expected return of 14% and a volatility of 35%, and the market portfolio has an expected return of 10% and a volatility of 18%.Assume that the CAPM assumptions hold.

The volatility of the alternative investment that has the lowest possible volatility while having the same expected return as Google is closest to:

10.8%

30.0%

18.0%

35.0%

how to compute that, please show the detail thanks