pls follow the instruction and answer the problems

Go to finance.yahoo.com. Download data for a stock of your choice. Data download: type in the stock symbol, then go to historical data, select starting date and end date (01/01/2006 to 12/31/2016). save ot as a csv file (comma separated values) Questions: Use Adjusted close for all computations Q1: Compute the 20 days moving average: avg(n) = avg(n - 1)*factor + close of today*(1 - factor) Q2: Compute the standard deviation at each day