b$.$ consider the following constructors for class staff :

public geaff$()\{$

this name$=""$;

this. $id=0$;

$\}$

public staff$($int i$,$ String n$)$ &

name $=n$;

$id=i$;

$\}$

public stafe$($int i$)$s

name $=n$;

$id=i$;

$3$

public staff$(3$tring n$)\}$

name $=n$;

id $=0$;

$3$

public stafe $($stafe s$)\}$

name $=$ s$.$ name;

$id=5.id$;

$\}$

Rewriting the code to use this in the constructor $(1,3,4)$ :

note:

$1-$ don't put any space when writing the code.

ex:

this $()$ incorrect

this $()$ correct

$2-$use these symbols for string $"\text{'}"$ and these symbols for character $"$

Rewriting the code to use this in constructor $(1,3,4)$ :

public staff $()\{//$ constructor $1$

$]$

public staff$($int $i,$ String $n)$ & $//$ constructor $2$

name $=n$;

$id=i$;

$]$

public staff$(3$tring $n)$ f $//$ constructor $3$

$\}$

public staff $($staff s$)$f$//$ constructor $4$