Using java and recursion solve the following question.

The pattern () method below has one line of code removed. The puzzle is to figure out what the line is. static String pattern (int n) {if (n >= 0)//removed line goes here//return " ";} Here are return values when n = 0 up to n = 9. A BA CBA ADCBA BAEADCBA CBAFBAEADCBA ADCBAGCBAFBAEADCBA BAEADCBAHADCBAGCBAFBAEADCBA CBAFBAEADCBAIBAEADCBAHADCBAGCBAFBAEADCBA