The manager of a travel agency has been using a seasonally adjusted forecast to predict demand for packaged tours. The actual and predicted values are as follows:

Period			Demand			Predicted
	1			135			113
	2			195			200
	3			155			150
	4			90			102
	5			85			80
	6			130			135
	7			125			128
	8			130			124
	9			95			109
	10			150			150
	11			105			94
	12			90			80
	13			125			140
	14			135			128

a. Compute MAD for the fifth period, then update it period by period using exponential smoothing with = .05. (Round your intermediate calculations and final answers to 3 decimal places.)

b. Compute a tracking signal for periods 5 through 14 using the initial and updated MADs. (Negative values should be indicated by a minus sign. Round your intermediate calculations and final answers to 3 decimal places.)