Question: The reverse of a string x , denoted rev x , is x written backwards.Formally, reE = def = E , rev xa = def

The reverse of a string x, denoted rev x, is x written backwards.Formally, reE =def=E, rev xa =def= a rev x.For example, rev abbaaab =baaabba. For A contained in alphabet*, definerev A =def={rev x Ix EinA}.For example, rev {a,ab,aab,aaab}={a,ba,baa,baaa}. Show that foranyA contained in alphabet*, if Aisregular, then so is revA.

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