Q2- Write a recursive definition for each of the following a) The operator * on any alphabet such as . b) The operator unary + on any alphabet such as . c) Reverse of a word such as w define on any alphabet such as . We represent the reverse of w with wR, which is the symbols of w written in the reverse order. Example: w=abbwR=bba d) The set of strings on any alphabet such as , which are palindrome. Palindrome strings are read the same forward and backward