Observe the given figure and answer the question that follows.
The radius of the circular steps in the order from 1st to 4th step is:
1
1.41 m, 1.11 m, 0.81 m, 1.71 m
2
1.7 m, 1.4 m, 1.1 m, 0.8 m
3
0.81 m, 1.11 m, 1.41 m, 1.71 m
4
0.8 m, 1.4 m, 1.1 m, 1.7 m