The tracking signals computed using past demand history for three different products are as follows. Each product used the same forecasting technique.

TS1 TS2 TS3
1 -2.70 1.54 0.10
2 -2.32 -0.64 0.43
3 -1.70 2.05 1.08
4 -1.1 2.58 1.74
5 -0.87 -0.95 1.94
6 -0.05 -1.23 2.24
7 0.10 0.75 2.96
8 0.40 -1.59 3.02
9 1.50 0.47 3.54
10 2.20 2.74 3.75

Discuss the tracking signals for each and what the implications are.
(USE EXCEL)