$1.(4$ points$)$ Create a Project called WhereAreMyFiles. Create a package called pak$1.$ Create a Class

called Difference. Write the Java program as follows.

public class Difference $\{$

public static void main$($String$[]$ args$)\{$

$//$ What is the difference?

System.out.print$("(10\mathrm{.}5+2*3)/(45-3\mathrm{.}5)=")$;

System.out.print$((10\mathrm{.}5+2*3)/(45-3\mathrm{.}5))$;

$\}$

$\}$

A$.$ Locate the Difference.java file and Difference.class file. Copy&Paste the directory where the

files were located. $($For example, C:$\backslash$mexu$\backslash$eclipse$-$workspace$\backslash$WhereAreMyFiles$\backslash$src$)$

Please refer to the tutorial on the next page if you don$$t know how to copy a directory.

$(1)$ Directory for your Difference.java file:

$(2)$ Directory for your Difference.class file:

B$.$ What is the difference between these two files: Difference.java file and Difference.class file?

C$.$ Run your program and look at the output. Explain the difference between the first print

statement and the second print statement.

$2.(3$ points$)$ Write a program called Table and use only strings to display the following table.

Screenshot your console output. $($The space between the columns is up to you$)$

a a$^2$ a$^3$

$111$

$248$

$3927$

$3.(3$ points$)$ Write a Java program called MoreArithmetic using java.lang.Math classes that display the

following on the console. Use Math.PI and Math.pow$($a$,$ b$)$ and do not manually type in the

numerical results for pi$,$ pi $*2,$ pi$^2.$ Copy&Paste your source code and screenshot your console

output.

pi is $3\mathrm{.}141592653589793$

pi $*2$ is $6\mathrm{.}283185307179586$

pi$^2$ is $9\mathrm{.}869604401089358$