Here is a specification for a class MyPhonebook. Use this for the problem that follow. The operations are all public.

Draw a State Chart Diagram describing the interaction protocol of MyPhoneBook

Here is a specification for a class MyPhonebook. Use this for the problems that follow. The operations are all public.

$```$

MyPhoneBook$()$;$//$ constructor

$//$ postcondition: getSize$()==0$

~MyPhoneBook$()$;$//$ destructor

void add $($string name, unsigned number$)$;

$//$ precondition: $($name $!=0)$ AND $($name $!="")$ and $($number $!=0)$

$//$ postcondition: If $($lookupNumber$($name$)==0)$ AND $($lookupName$($number$)==""),$ then

$($the pair $($name$,$ number$)$ are added to the phonebook$)$

AND $($the existing phonebook entries are unchanged$)$ AND $($getSize$()+1==$ getSize$()\text{'})$

void remove $($string name$)$;

$//$ postcondition: If $($lookupNumber$($name$)!=0)$ then

$($the pair $($name$,$ lookupNumber$($name$))$ is removed from the phonebook$)$

AND $($the remaining phonebook entries are unchanged$)$ AND $($getSize$()\text{'}==$ getSize$()-1)$

void remove $($unsigned number$)$;

$//$ postcondition: $($the phonebook entries are unchanged$)$ AND $($getSize$()\text{'}==$ getSize$())$

unsigned lookupNumber $($string name$)$;

$//$ postcondition: If name$|$ exists in the phonebook, then return its associated number. The

phonebook entries are unchanged AND $($getSize$()\text{'}==$ getSize$())$

string lookupName $($unsigned number$)$;

$//$ postcondition: Return $"".$ The phonebook entries are unchanged AND $($getSize$()\text{'}==$ getSize$())$

int getSize$()$;

$//$ postcondition: $($getSize$()\text{'}==$ getSize$())$ AND $($the phonebook entries are unchanged$)$

$```$