The following data were gathered for the reaction
CD → C + D
Time(s)   [CD] (M)
0             1.00
10            0.833
20           0.714
30           0.625
40           0.555
50           0.505
60           0.455
Determine the following:
a. Order of the reaction
b. Rate constant of the reaction
c. Concentration of CD at 80 s