Assuming that the following classes have been defined:

public class Water extends Earth $\{$

public void method$1()\{$

System.out.println$("$Water $1")$;

$\}$

public void method$3()\{$

System.out.println$("$Water $3")$;

$\}$

$\}$

public class Fire $\{$

public void method$1()\{$

System.out.println$("$Fire $1")$;

$\}$

public void method$2()\{$

System.out.println$("$Fire $2")$;

method$1()$;

$\}$

$\}$

public class Earth extends Fire $\{$

public void method$1()\{$

System.out.println$("$Earth $1")$;

super.method$1()$;

$\}$

$\}$

public class Air extends Fire $\{$

public void method$3()\{$

System.out.println$("$Air $3")$;

$\}$

$\}$

And assuming the following variables have been defined:

Fire var$1=$ new Water$()$;

Fire var$2=$ new Earth$()$;

Fire var$3=$ new Fire$()$;

Object var$4=$ new Earth$()$;

Earth var$5=$ new Water$()$;

Fire var$6=$ new Air$()$; Solve these,

var$2.$method$1()$;

var$3.$method$1()$;

var$4.$method$1()$;

var$5.$method$1()$;

var$6.$method$1()$;

var$1.$method$2()$;

var$2.$method$2()$;

var$3.$method$2()$;

var$4.$method$2()$;

var$5.$method$2()$;

var$6.$method$2()$;

$(($Water$)$var$4).$method$2()$;

$(($Fire$)$var$4).$method$2()$;

$(($Air$)$var$6).$method$3()$;

$(($Earth$)$var$1).$method$3()$;

$(($Water$)$var$1).$method$3()$;

$(($Water$)$var$2).$method$3()$;

$(($Earth$)$var$1).$method$2()$;

$(($Water$)$var$6).$method$3()$;