Table:
age groups
%

15 to 24
88.1

25 to 34
95.2

35 to 44
92.5

45 to 54
87.3

55 to 64
78.9

65 and over
63.5

household income quartile

quartile 1 lowest household income
70.2

quartile 2
81.8

quartile 3
88.8

quartile 4 highest household income
93.5

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':(X1, Y1), 'bottom-right':(X2, Y2)}, where '(X1, Y1)' and '(X2, Y2)' 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.

This table does not contain any merged cells.