International time difference

This task is about working with negative numbers and international time zones.
 
 
This table shows how many hours difference there is between New Zealand local time and the following countries and cities.
 
Cairns (C) ⁻2 Norfolk Island (NI) ⁻0.5
Athens (A) ⁻10 Tonga (T) +1
Paris (P) ⁻11 London (L) ⁻12
Osaka (O) ⁻3 Los Angeles (LA) ⁻20
Malaysia (M) ⁻4 Western Samoa (WS) ⁻23
 
 
a)
 
 
 
 
On the line above, show the differences in time between New Zealand and these places. Number the time line.
 
b) What is the time difference between Tonga and Osaka? __________
 
c)
If Jason left New Zealand at 11:00 a.m. on a 3-hour flight to Tonga,
 
what would be his arrival time in Tongan time? __________
 
d) If Mrs Hawera, who lives in New Zealand, wanted to speak to a person in Los Angeles at 9:00 a.m. on Thursday (their time), on what day and at which time should she telephone?
 
Day: __________          Time: __________