If P(A)=0.3, P(B)=0.5, and P(AUB)=0.6, find P(A/B) (probability of b occurring given that

1)    If P(A)=0.3, P(B)=0.5, and P(AUB)=0.6, find P(A/B) (probability of b occurring given that a already did)

2)    If A and B are independent events and P(A)=0.3 and P(B)=0.6, what is P(A U B)?