Questions $1-10$ are designed to review some statistical concepts as well as to help you understand the benefits from diversification. Assume that there are two assets $($ A and $B)$ and there are four possible future scenarios. The four scenarios and their probabilities are shown in the following table. The last two columns show the returns on assets A and $B$ in the four possible scenarios.

$\backslash$table$[[$Scenario$,$Probability,$R_A,R_B$