Question about independence and calculating probability

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I have this question as a homework and have tough time understanding it:

Let $A$ and $B$ be two independent events.

(b) If we additionally know that $P(A|B) = 0.6$ and $P(B|A) = 0.3$, compute the probabilities of the following events:

(i) at most one of $A$ or $B$

(ii) either $A$ or $B$ but not both.

From my understanding, if $A$ and $B$ are independent, then the probability of $A$ is 0.6 and the probability of $B$ is 0.3, but I don’t understand what exactly am I supposed to do in (i) and (ii) and how to calculate it.

Thank you in advance!