1. import
11. false
14. HI
15. ABCDEFGHIJ
16. hello
24. 5
25. package com.company;

/*

    Amon Guinan
    Dec 5, 2018

*/
public class Main {

    public static void main(String[] args) {
	// write your code here

    String s = "Hello World";
        System.out.println(s.length());
    }

}

26.
public class Main {

    public static void main(String[] args) {
	// write your code here


        Scanner reader = new Scanner(System.in);
        System.out.println("Enter a string: ");
        String n = reader.nextLine();
        System.out.println(n);
        System.out.println(n.length());

        reader.close();
    }

}
27.
System.out.println(s1+s2+s3+s4);
36.
Decimal format should be double.
37.
system is not System
38.
you dont need String(). just "Hello World".
39.
?
43.
?
45.
used int. Use string instead.
49.
grade = grade *100;