2HI (g) → H2 (g) + I2 (g)

Experiment
[HI] (M)
Rate (M/s)
1
0.015
1.1 x 10-3 M/s
2
0.030
4.4 x 10-3 M/s
3
0.045
9.9 x 10-3 M/s


Determine:
the reaction order for each reactant.
the overall order for the whole reaction.
the k constant.