What was the monthly retum for Unilever (UN) from January to February 2015 ? Part 2 Attempt 1/10 for 10 pts. What was the monthly retum for an equally-weighted portfolio of the five stocks (excluding the S\&P 500) from January to February 2015 ? Part 3 Attempt 1/10 for 10 pts. Regress the returns for each stock and the portfolio on the returns for the S\&P 500 . What is the R 2 of the regression for the portfolio? Part 4 Attempt 1/10 for 10 pts: What is the A 2 of the regression for a portfolio with the following weights?.