1) ABC stock price and dividend history are as follows: An investor buys 3 shares of ABC at the beginning of 2019, buys another 2 shares at the beginning of 2020 , sells one share at the beginning of 2021 and sells all four remaining shares at the beginning of 2022. a) What is the arithmetic time-weighted average? b) What is the geometric time-weighted average? c) What is the dollar-weighted average (IRR)