Show excel financial formula if possible!

1. A Stock's return has the distribution as shown in the table below. Calculate the stock's expected return, and standard deviation. SHOW ALL CALCULATIONS!! Market Demand Weak Below Average Average Above Average Strong Probability of Return Associated Occurrence with Occurrence 0.15 -12% 0.2 0% 0.3 10% 0.2 18% 0.15 23% A. Expected Return = B. Standard Deviation of the Rate of Return =