question: this allows the intelligence of windows to decide the correct software application to open your w3cat file.
Capitalize this past sentence correctly.
A: This allows the intelligence of Windows to decide the correct software application to open your W3CAT file.

question: -f clears the routing tables of all gateway entries.
Capitalize this past sentence correctly.
A: -f Clears the routing tables of all gateway entries.

question: the only thing keeping it from tipping over when i racked a heavy barbell were two 55-pound bumper plates resting on the back legs of the rack.
Capitalize this past sentence correctly.
A: The only thing keeping it from tipping over when I racked a heavy barbell were two 55-pound bumper plates resting on the back legs of the rack.