First Question

When crossing the finish line, are you supposed to leave it in gear and use the brakes until the rpms get low, immediately take it out of gear and use the brakes, or downshift while using the brakes?

Second Question

In a rolling race, (say from 40 mph), whats the order that you're supposed to do everything?

Are you supposed to:
Go 40 in high gear (~4th or 5th) to have a cruising rmp
[First honk] Clutch in...rev match...downshift to racing gear
Hold clutch in
[Third honk] Clutch out and hit gas.

-or-

Do all the downshifting right before the third honk

-or-

Go 40 in low gear (~2nd or 3rd) to have a high, passing rmp
Keep clutch out
[Third Honk] Hit gas