Question: 1 . Let Sigma = { a , b } and consider languages A = { b , aa , ba } and B

1. Let \Sigma ={a, b} and consider languages A ={b, aa, ba} and B ={\epsi , a, bb}.
(a) Write down all strings in \Sigma
that have length at most two.
(b) How many strings are in A B? Write down all of them.
(c) How many strings are in B A? Write down all of them.

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