Intro Go to Yahoo Finance and download monthly stock price data for Apple (AAPL), Amazon (AMZN) and Alphabet (GOOG) for all of 2015, 2016 and 2017. Use the adjusted close prices to calculate monthly returns. What was the arithmetic average monthly return for Alphabet? Part 2 0 Attempt 1/10 for 9.8 pts. What was the arithmetic average monthly return for a portfolio 20% invested in Apple, 40% invested in Amazon and the remainder in Alphabet? Part 3 0 Attempt 1/10 for 9.8 pts. What was the standard deviation of the portfolio? Intro Go to Yahoo Finance and download monthly stock price data for Apple (AAPL), Amazon (AMZN) and Alphabet (GOOG) for all of 2015, 2016 and 2017. Use the adjusted close prices to calculate monthly returns. What was the arithmetic average monthly return for Alphabet? Part 2 0 Attempt 1/10 for 9.8 pts. What was the arithmetic average monthly return for a portfolio 20% invested in Apple, 40% invested in Amazon and the remainder in Alphabet? Part 3 0 Attempt 1/10 for 9.8 pts. What was the standard deviation of the portfolio