The information below shows the concentration of AB vs. time for the reaction:

NO₂(g) ----> NO(g) + 1/2 O₂(g)

Time (s)	[NO2]
0	1
10	0.951
20	0.904
30	0.86
40	0.818
50	0.778
60	0.74
70	0.704
80	0.67
90	0.637
100	0.606

Determine by graphical analysis using excel or other, the half-life of the reaction. Show all calculations. The graph should contain a title, axes, and units.