a.

b.

Trace the program segment below by showing the values for each variable and write the program segment output. (Assume the codes are free of any syntax error.) 1 2 String s1 = new String("Good programmer"); String s2 "Outstanding"; string s3 sl + " are awesome" ; System.out.println(s1.replace('o', '$')); System.out.println(s3.length()); System.out.println(s2.concat($2)); System.out.println(s3.substring(5) + " cool"); System.out.println((s1 + 32).indexOf("standing")); 5 6 7 8 Based on declaration of the string s4 below, write a program segment that determine and displays the number of 'm' characters in the s4 string variable. String s4 - "Computer programming