please help by writing on A4 paper, by clearly writing the formulas and operations.

3) An investor has 800000TL to invest. He invests 600000TL in stock A which has variance of %12,5 and expected return of 0,25 . He considers to invest the rest in Stock B. Stock B has variance of %25 and expected return 0,6 . The correlation coefficient between A and B is 0,45 . a) Calculate the expected return and standard deviation of a portfolio that includes A and B stocks. b) Is there a way to reduce systematic risk of this portfolio? If, explain briefly