answer question showing work please,thank you

Portfolio Risk and Return 1. Calculate the expected rate of return and standard deviation for stocks W, M and portfolio MW in example 8 in handout \#4 (We invest 50% in Stock W.) Show your formulae, Video 9 will be helpful. 2. Calculate the expected rate of return and standard deviation for stocks W,Y and portfolio WY in example 9 in handout \#4 (We invest 50% in Stock W.) Show your formulae. 3. Find the expected rate of return and return standard deviation for Stock HT. Stock COLL, and the portfolio with 50% HT and 50% in Coll. (Example 10 in Handout # ). Show your detailed calculations. Don't just copy my answers in the notes. Show your formulae. 4. Use your answers frem questions 13 in this section to explain diversification of risk using portfolio with multiple stocks