Without Excel Please

2) Suppose the return for stocks A and B for the last six months have been the following: A 3,2% 4,1% -2,7% -0,5% 6,7% 5,5% B 4,7% 2,0% 1,4% -0,8% 2,7% -1,2% a. What is the expected return, variance and standard deviation of the two stocks? What is the covariance and correlation among them? b. What would the return and standard deviation of a portfolio that is 30% invested in stock A and 70% invested in stock B be