are these correct

Given the following information: a. Calculate the expected return and the standard deviation for Stock 1 and Stock 2 respectively. ( 6 pts) (.25.05)+(.4x.07)+(.35.11)=.079(.25.3)+(.4.18)+(.35.17)=.08751std).25(.05.079)2+.4(.07.079)2+.35(.11.079)2.00021025+.0000324+.00033635=.000579.4=5.07074%2std).25(.3.0875)22+.4(.18.0875)22+.35(.17.0875)2.011289063+.0034225+.023207188=3.79187505% b. What is the expected retum for a portfolio with an investment of $7,000 in Stock 1 and $3,000 in Stock 2 ? [Hint: Calculate portfolio weights, W1 and W2, first.] (2 pts)