Can you solve with details and please add a note and formulas,thank you.

You own three stocks and have estimated the following joint probability distribution of returns:

Market Condition	Probability of Occurence	Return on Stock A	Return on Stock B	Return on Stock C	Return on Stock D
Growth	35%	10	80	90	30
Normal	40%	40	20	10	30
Recession	25%	80	-10	-30	30

1. Calculate the portfolios expected return and standard deviation if you invest 35% in Stock A, 35% in Stock B, 30% in Stock C. (20 points)
2. Calculate the portfolios expected return and standard deviation if you invest 25% in Stock A, 25% in Stock B, 25% in Stock C, 25% in Stock D,. (20 points)