deduce the php function to add a last name smith to person 2 using the oop approach

Person 1: Person Object

(

[_name:private] => Tom

[_job:private] => Button-Pusher

[_age:private] => 34

)

Person 2: Person Object

(

[_name:private] => John

[_job:private] => Lever Puller

[_age:private] => 41

)

Person 1: Person Object

(

[_name:private] => Tom

[_job:private] => Box-Mover

[_age:private] => 35

)

Person 2: Person Object

(

[_name:private] => John

[_job:private] => Lever Puller

[_age:private] => 42

)