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. BAttempt 1/10 for 10 pts. Part 1 Use the adjusted close prices to calculate monthly returns. What was the arithmetic average monthly return for Alphabet? 4+ decimals Submit Attempt 1/10 for 10 pts. Part 2 What was the arithmetic average monthly return for a portfolio 10% invested in Apple, 20% invested in Amazon and the remainder in Alphabet? 4+ decimals Submit Part 3 What was the standard deviation of the portfolio? 3+ decimals Submit Attempt 1/10 for 10 pts. 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. BAttempt 1/10 for 10 pts. Part 1 Use the adjusted close prices to calculate monthly returns. What was the arithmetic average monthly return for Alphabet? 4+ decimals Submit Attempt 1/10 for 10 pts. Part 2 What was the arithmetic average monthly return for a portfolio 10% invested in Apple, 20% invested in Amazon and the remainder in Alphabet? 4+ decimals Submit Part 3 What was the standard deviation of the portfolio? 3+ decimals Submit Attempt 1/10 for 10 pts