Question: Given an alphabet Sigma = { a , b , c } and a language L consisting of all strings of length < =

Given an alphabet \Sigma ={a, b, c} and a language L consisting of all strings of length <=3 that begin with a and end with an a, which of the following is the set of all strings in L?
{aaa, aba, aca}
{a, aa, aba, aca}
{a, aa, aaa}
{a, aa, aaa, aba, aca}

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