2. Please explain what the recursive function will do. This function takes a string argument (str), and two integer arguments: i - the first position in the string; and x the last position in the string. Please show output and recursive trace of Mystery ("abbba", 0, 4), Mystery ("acca", 0, 3), Mystery ("abcd", 0, 3) Public Static booleen Mystery(string str, int i, int x)[ if (i>=x) return true; else if(str[i] != str[x]) return false; else return Mystery (str,i+1,x1) ( )