Number of Inbounders

[Luke3161]

Hi,
I have been looking through the manual, and haven't found anything specific regarding the number of inbounders.
The general consensus so far has been that there are three inbounders because there are three human players on each alliance. But, rule [G04] states that "Each FRC team provides up to four Players", which implies to me that there may not necessarily need to be a full team there. Also, do you think that this would apply to number of drivers or whether or not there needs to be a coach on the team?

This would affect the number of balls a team can be in possession of, since each inbounder can hold two balls.

If anyone has noticed a rule that I missed, or a different interpretation of a rule, please share.

Thanks,