Q: Let |A|=n,|B|=m be finite sets then (Using Inclusion-Exclusion Law)

Question

due to question above we need to answer |A∪B|, |A∩B|

I dont know how solve this question with value of just A and B

this is rules

|A∪B|= |A|+|B - |A∩B|

|A∩B|= |A|+|B| -|A∪B|