Pull the 2016 daily stock prices of Walmart from "Yahoo Finance" to estimate the daily standard deviation and annualized volatility of Walmart's holding period returns using (1) 90 days prior to 2016 year-end, (2) 180 days prior to 2016 year-end, and (3) the whole year of 2016.
Please upload screenshots of step by step on how to build this using Excel,