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Write a short recursive Java method that determines if a strings is a palindrome, that is, it is equal to its reverse.
Examples of palindromes include 'racecar' and 'gohangasalamiimalasagnahog'.

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Consider the following recursive method in Java that determines ifa string is a palindrome (i.e., reads the same forward or backwards) or not: Public boolean isPalindrome ( String str ){If( str.length() ≤ 1 )return true;elsereturn ( str.charAt (0) == str.charAt( str.length() – 1 ) &&isPalindrome( str.substring(1..str.length() - 1)));} // end of isPalindrome a. Explain convincingly why the recurrence below for f(n), where n is the length of the string parameter str, is a correct expression for the number of primitive operationsrequired by a call isPalindrome.t(0) = Θ(1)t(1) = Θ(1)t(?) = t(? − 2) + Θ(1)b. Show that t(n) = Θ(n), solves the recurrence for t(n) in (a) above.
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