Nitrogen dioxide decomposes when heated. 2NO2(g) 2NO(g) + O2(g) During an experiment, the concentration of NO2

Question:

Nitrogen dioxide decomposes when heated.
2NO2(g) → 2NO(g) + O2(g)
During an experiment, the concentration of NO2 varied with time in the following way:
Time [NO2]
0.0 min………. 0.1103 M
1.0 min………. 0.1076 M
2.0 min………. 0.1050 M
3.0 min………. 0.1026 M
Obtain the average rate of decomposition of NO2 in units of M/s for each time interval.