Question: Q5: Build an FA that accepts only those words that begin or end with a double letter over S = {a, b}. Q6: Write a

Q5: Build an FA that accepts only those words that begin or end with a double letter over S = {a, b}.

Q6: Write a regular expression for (a+b)*a(a+b)* ?

Q7: Write a regular expression for (a+b)*a(a+b)*a(a+b)* ?

Q8: Write a regular expression for (a+b)*(aa+bb)(a+b)* ?

Q9: Write a regular expression for (a*b*)* ?

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