The graph below is for pulse rates before and after exercise.

Before

Pulse

Rates

After

9 8 8 7 6 5 2

6

9 8 8 8 6 5 5 5 1 1 0 0

7

8 8 7 5 4 2

8

5 6 6 7 8 9

4 0

9

0 1 1 2 3 4 5 5 6 8

4

10

0 1 4 6 7

11

6 7

12

4 5 8

What was the slowest pulse rate after the exercise group?