Table:
size 4 screws	$9 per pound

size 5 screws	$5 per pound

size 3 screws	$5 per pound

size 1 screws	$7 per pound

size 2 screws	$5 per pound

Tell me the row and column numbers of the shown table. Show your final answer in the JSON format {"row_number": "m", "column_number": "n"}.

This table has 5 rows and 2 columns. Thus, the final answer is {"row_number": "5", "column_number": "2"}.