1. Given the expected returns, standard deviations, and the covariance or correlation coefficient of two assets, how do you calculate the expected return and standard deviation of a specific portfolio of these two assets?
2. How to calculate the diversification effect of a portfolio of two assets?
3. What do all points that cluster in an umbrella shape in the R_{P p} plane represent. What is the above-mentioned cluster called?

4. What is the North-West direction on the above-mentioned plane desirable