Use the monthly data (September 2013 - November 2014) provided on the closing prices for Gold (GLD), NASDAQ, Oil (USO) and Facebook (FB).

Date	GLD	NASDAQ	USO	FB
Sep-13	128	3771	37	50
Oct-13	128	3920	35	50
Nov-13	121	4060	33	47
Dec-13	116	4177	35	55
Jan-14	120	4104	35	63
Feb-14	128	4308	37	68
Mar-14	124	4199	37	60
Apr-14	124	4115	36	60
May-14	120	4243	38	63
Jun-14	128	4408	39	67
Jul-14	123	4370	36	73
Aug-14	124	4580	36	75
Sep-14	116	4493	34	79
Oct-14	113	4631	31	75
Nov-14	115	4713	29	74

What is the approximate value of mean absolute error (MAE) of forecasting based on 3 period moving average for Oil prices?

		2.64
		4.10
		3.26
		1.97