Table:
activities
participation rate
average time spent

excellent or very good
good
fair or poor
excellent or very good
good
fair or poor

percent
hours

doing unpaid household work
89
87
84
3.4
3.2
2.9

engaging in civic, religious and organizational activities
10
9
5
2.3
1.9
2.1

socializing and communicating
45
41
37
2.3
2.2
2.4

engaging in leisure and physical activities
45
39
36
2.2
2.1
2.3

using technology
32
27
25
1.9
2.0
2.3

watching television and videos
82
88
85
3.7
4.2
4.9

reading
42
37
32
2.0
2.0
2.0

sleeping
100
100
100
8.9
9.1
9.5

The task is as follows:
Analyze the table in this image to find every merged cell. Return the regions of these merged cells in the JSON {'top-left':(X, Y), 'bottom-right':(Z, W)}, where '(X, Y)' and '(Z, W)' show the (row_id, column_id) of the top-left and bottom-right cells in these regions, respectively. The row and column IDs start from 1.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(3, 1)}
{'top-left':(1, 2), 'bottom-right':(1, 4)}
{'top-left':(1, 5), 'bottom-right':(1, 7)}
{'top-left':(3, 2), 'bottom-right':(3, 4)}
{'top-left':(3, 5), 'bottom-right':(3, 7)}.