If you know that the standard deviation of the returns on investment (A) is 5%, the standard deviation of the returns on investment (B) is 10%, and the correlation coefficient between the returns of the two investments is 0.6, then it is necessary to calculate both the risks of Portfolio made up of 1 & B investments equally. 4.6% O 8.6% O 6.8% 7.5% O 1 A