Allowed Defenses while Grappling?

[laserdog]

Alright, I'm confident someone is going to point out where these rules are, but I've looked through Campaigns, Martial Arts and tried searching the forums.

I'm looking for rules on dodging while grappling a foe and while being grappled?

Is it allowed?

The rules say the guy who is grappled cannot move out of their hex without breaking free, but doesn't say anything about whether they can dodge, or whether the DX-4 penalty also lowers their speed which lowers their dodge?

Also it's not clear if the guy doing the grappling can dodge without losing their grip.

Again, I'm sure the rules address it somewhere, I'm just sick of looking. =)

Thanks in advance.

(Also, for bonus points, can anyone clarify whether the DX-4 is *cumulative* if there are more than one person grappling you? And how two people grappling you could work together to bring you down?)