Table:
types of activities
2013
2010
2007
2004

percentage of volunteers

organizing events
46
44
45
47

fundraising
45
45
44
46

sitting on a committee or board
33
33
33
36

teaching or mentoring
28
30
30
30

counselling or providing advice
26
28
28
26

collecting, serving or delivering food or other goods
25
28
27
25

office work, bookkeeping
22
23
24
25

other activities
20
15
18
10

coaching, referring or officiating
17
18
20
19

driving
17
17
20
20

providing health care or support
17
19
20
19

environmental protection
16
18
19
16

maintenance or repair
16
16
18
18

canvassing
10
14
13
15

first-aid, fire-fighting, or search and rescue
6
6
6
7

A merged cell in a table could be represented by the JSON {'top-left':(X, Y), 'bottom-right':(Z, W)}, where '(X, Y)' and '(Z, W)' signify the (row_id, column_id) of the top-left and bottom-right cells in the merged area. Using the shown table image, locate all merged cells and provide their coordinates in this format. Bear in mind that row and column IDs begin from 1.

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