Question: Let L 1 = { w in { a , b } : w contains exactly one b } . Let L 2 = {

Let L1={w in {a,b} : w contains exactly one b}.
Let L2={w in {a,b} : w starts with a}.
a) Write down a regular expression for L1.
b) Write down a regular expression for L2.
c) Describe the language L1\cap L2 and write a regular expression for it.

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