A portfolio consists of 4 securities
Security 1: Beta= 1.2 Standard deviation of random error term=5% Proportion=.10
Security 2: Beta=1.03 Standard deviation of random error term= 7% Proportion = .10
Security 3: Beta= 1.05 Standard deviation of random error term=8% Proportion=.50
Security 4: Beta= .90 Standard deviation of random error term= 2% Proportion= .30
The standard deviation of the market index is 15%. What is the total risk of this portfolio?