Suppose that class A is defined by the following code. Let a be an instance of A$.$ Which of the statements are correct inside the main method?

public class A $\{$

int num;

static String str;

void numMethod$()\{$

$\}$

static void strMethod$()\{$

$\}$

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

A a $=$ new A$()$;

$\}$

$\}$

a$.$numMethod$()$;

System.out.println$($a$.$num$)$;

System.out.println$($A$.$str$)$;

System.out.println$($a$.$str$)$;

System.out.println$($A$.$num$)$;

a$.$strMethod$()$;