Table:
Athlete	Events	Heat	Semifinal	Final

Result	Rank	Result	Rank	Result	Rank

Durgesh Kumar	400 m hurdles	53.15	1 Q	N/A	51.76	-

Sachin	Discus throw	N/A	55.43 m	5

Navjetdeep Singh	Shot put	N/A	18.81 m	-

Different merged cells often exist in a table and they can be represented by the JSON {'top-left':(X, Y), 'bottom-right':(Z, W)}. In this JSON item, '(X, Y)' and '(Z, W)' are the (row_id, column_id) coordinates for the top-left and bottom-right cells in the merged region, respectively. Please examine the provided table image, identify all merged cells, and return their details using the above-mentioned format. Remember, the numbering for both rows and columns starts at 1.

The merged cell areas are as follows:
{'top-left':(1, 1), 'bottom-right':(2, 1)}
{'top-left':(1, 2), 'bottom-right':(2, 2)}
{'top-left':(1, 3), 'bottom-right':(1, 4)}
{'top-left':(1, 5), 'bottom-right':(1, 6)}
{'top-left':(1, 7), 'bottom-right':(1, 8)}
{'top-left':(3, 5), 'bottom-right':(3, 6)}
{'top-left':(4, 3), 'bottom-right':(4, 6)}
{'top-left':(5, 3), 'bottom-right':(5, 6)}.