1. is correct ...
if you have indep then P(B|A)=P(B)
2. You're wrong here...
Indep and ME are almost opposites
HOWEVER, you asked for P(A and B)=P(AB)=0
ME means that the intersection is empty, hence the probability is zero.
3. Doesn't make sense
YOU seem to be mixing up and's (which are intersections) with or's (unions).