Table:
1991 study alternatives (southern corridor, Chicago–Twin Cities)

Speed
Motive
power
Yearly ridership est.
Trip time
Capital cost (1989 $)
Net consumer surplus NPV

2000
2024

125 mph
diesel
5.8 million
8.1 million
4h20
$940 million
3004.8

185 mph
electric
7.5
10.6
3h15
$3.02 billion
3851.3

300 mph
maglev
8.5
12.2
2h15
$5.45 billion
3190.7

For the table shown in this image, can you tell me the row and column numbers of this table? Output the final answer as JSON in the format {"row_number": "m", "column_number": "n"}.

There are 5 rows and 7 columns in the table. So, the final answer is {"row_number": "5", "column_number": "7"}.