for java

You compare two strings s1 and s2 using _. Compare (s1. s2) compare(s2) compare to (s1. s2) compare to (s2) Suppose is Ana s2 are two strings. Which of the following statements or expressions is incorrect? String s3 = s1 - s2. Boolean b = s1 compare To(s2); char = S1(0). char c = si, ctwAl(s1. length()|; The following loop displays _. 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 1 3 5 7 9 2 4 6 8 10