2) an investor buys three shares of xyz at the beginning of 2019 for $100 apiece. by the end of 2019, the share price has increased to $110 and she receives $4 dividend per share. right after receiving the dividend, she buys two additional shares at $110. by the end of 2020, the share price has dropped to $90, but the investor still receives a dividend per share of $4. right after receiving the dividend, she sells one share at $90. by the end of 2021, the share price has gone up to $95, the investor receives a dividend per share of $4 and sells all shares at $95 immediately after receiving dividends.1 a) calculate the arithmetic, geometric, and the dollar-weighted average rate of return. b) why is the dollar-weighted average different than the geometric average