Use the code below to complete the tasks described below, use any java compiler to test your code.

class subject$\{$

private String sub;

private int marks;

private double average;

public subject$()\{$

sub $=$ "Physics";

marks $=60$;

average $=79\mathrm{.}5$;

$\}$

$\}$

$[$This provides evidence for PC $3\mathrm{.}5]$

$2-$ Create a static method called change with one parameter that will assign the value for the test$1$

variable.

$[$This provides evidence for PC $3\mathrm{.}4]$

$3-$ Create a no parameterized constructor that initialize the instance variables as follows:

i$.$ sub $=$ "Physics";

ii$.$ marks $=60$;

iii. average $=79\mathrm{.}5$;

$4-$ Create a method that displays "pass" if the average value of the calling object is $60$ or more and

displays "fail" otherwise.

$[$This provides evidence for PC $3\mathrm{.}7]$