Can someone explain to me how to answer Questions 3 & 4? Thanks

Tutorial 8 – Risk and Return You purchased 150 shares in ABC Ltd at the beginning of the year at a price of $75.15. During theyear the company paid a dividend of $1.12 per share and the share price closed the year at $67.87. What was your dollar return on the investment? What is your percentage return? Why is diversiﬁcation an important concept in ﬁnance? Using the following, caICuIate the average returns and the standard deviations for X and Y. Whichshare will perform better next year? Year Return on X Return on Y1 14% 32%2 -21% -5%3 17’96 13%4 9% -12%5 23% 45% Calculate the expected return and standard deviation for a portfolio consisting of 30% in AntLtd and the remainder in Bell Ltd. State of Probability Rate of return Rate of returneconomy of state Ant Ltd Bell LtdRecession Normal Boom