Table:
Number of lockers	Number of basketballs

1	5

2	10

3	15

4	20

5	?

I'd like to know the total number of rows and columns in the provided table. Return the result as JSON in the format {"row_number": "m", "column_number": "n"}, e.g., {"row_number": "12", "column_number": "7"}.

This table has 6 rows and 2 columns. Thus, the final answer is {"row_number": "6", "column_number": "2"}.