Question: Let L 1 = { w in { a , b } : | w | is divisible by 4 } and L 2 =

Let L1={w in {a, b}: |w| is divisible by 4} and L2={w in {a, b}
: |w| is divisible by 6} be two languages.
1. Is L1\cap L2 a regular language, explain why or why not?
2. Is L1\cup L2 a regular language, explain why or why not?

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