You have created the following class called Job:

public class Job $\{$

private String role;

private long salary;

public String getRole$()\{$

return role;

$\}$

public void setRole$($String role$)\{$

this.role $=$ role;

$\}$

public long getSalary$()\{$

return salary;

$\}$

public void setSalary$($long salary$)\{$

this.salary $=$ salary;

$\}$

$\}$

How would you use composition in a Person class to indicate that a person has a job and set the role to a Programmer?

a$.)$

public class Person extends Job $\{$

public Person$()\{$

super$()$;

setRole$("$Programmer$")$;

$\}$

$\}$

b$.)$

public class Person $\{$

private Job job;

public Person$()\{$

super$()$;

job.setRole$("$Programmer$")$;

$\}$

$\}$

c$.)$

public class Person $\{$

public Person$()\{$

Job job$=$new Job$()$;

job.setRole$("$Programmer$")$;

$\}$

$\}$

d$.)$

public class Person $\{$

private Job job;

public Person$()\{$

this.job$=$new Job$()$;

job.setRole$("$Programmer$")$;

$\}$

$\}$