For question 4, determine the variable you will receive after the function is finished

System.out.println(Character.isDigit('4')); System.out.println(Character.isLetter('$'));. char ch='3'; System.out.println(Character.isLetterOrDigit(ch));.. System.out.println(Character.isLowerCase('A'));. System.out.println(Character.isUpperCase('a'));. System.out.println(Character.toLowerCase('A'));. System.out.println(Character.toUpperCase('a'));.. String Word1="The Kean", Word2="University"; String print=Word1.substring(4); String print2=Word1.substring(4,8); String s1="New York is" ; System.out.println(s1.length()); System.out.println(s1.charAt(1));.. String s2= "state"; String s3=s1.concat(s2);.. System.out.println(s3.length());.. ||