Consider the following program, and the resulting error messages that occur

when the program gets compiled using the $$javac$$ command. In $1$ or $2$ simple

English sentences, explain why the error messages occurred:

$//$ This program does not compile. How come?

class BadExample

$\{$

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

$\{$

int x $=3$;

int y $=7$;

computeSum$()$;

$\}$

static void computeSum$()$

$\{$

int sum $=$ x $+$ y;

System.out.println$("$sum $="+$ sum$)$;

$\}$

$\}$

Here is what was output after we attempted to compile this program:

BadExample.java:$12$: error: cannot find symbol

int sum $=$ x $+$ y;

$^$

symbol: variable x

location: class BadExample

BadExample.java:$12$: error: cannot find symbol

int sum $=$ x $+$ y;

$^$

symbol: variable y

location: class BadExample

$2$ errors