Forum:The Six Samurai using priority

Hi there, just a little question about six samurai priority:

Player A) Have any monster on his side of the field and a face-down compulsory evacuation device Player B) Have any six samurai...suppose its Six Samurai Yaichi, and summon Hand of the six samurai Player A) Activates Compulsory evacuation device on Hand of the six samurai

Can player B use priority and activate Hand of the six samurai's eff? Can he tribute Yaichi or Hand to activate Hand's eff? I supposse if player A activated CED on Yaichi, Hand's effect doesn't resolve even if player B tried to tribute Hand for it's own effect, am I right?

Thanks