Question 2 Suppose that s1, s2, s3, and s4 are four strings, given as follows: String s1 = "Welcome to Java after Python"; String s2 = s1; String s3 = new String("Welcome to Java after Python"); String s4 = " Welcome to Java after Python"; Write a program to finds the results of the following expressions? (1) s1 == s2 (2) s2 == s3 (3) s1.equals(s2) (4) s2.equals(s3) (5) s1.compareTo(s2) (6) s2.compareTo(s3) (7) s1 == 54 (8) s1.charAt(0) (9) s1.indexOf('j') (10) s1.indexOf("to") (11) s1.lastIndexOf('a') (12) s1.lastindexOf("o", 15) (13) s1.length() (14) s1.substring(5) (15) s1.substring(5, 11) (16) s1.startsWith("Wel") (17) The last word in s1

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