Calculate Adidas' and S&P 500 Index's average rate of returns and standard deviation, based on the data below.

DATA
Month			Adidas			S&P 500
			Stock Prices			Index
Jan-19			52.9			2368.45
Feb-19			67.16			2363.64
Mar-19			68.73			2362.72
Apr-19			65.41			2384.2
May-19			62.99			2411.8
Jun-19			70.1			2423.41
Jul-19			69.05			2470.3
Aug-19			62.81			2471.65
Sep-19			61.85			2519.36
Oct-19			64.99			2575.26
Nov-19			70.42			2647.58
Dec-19			72.55			2673.61