Time zones: What time is it?

Calculate the hour of each case using the time zones map. 

a)  The final match of US OPEN is at 10.00 AM. At what time do you need to switch on your TV?

b) You best friend is working at Sydney. You want to invite him to your wedding. If he arrives home at 3.30 PM at what time can you phone him?

c) You are on holidays in Madagascar. You want to talk with you family at 13.00 (spanish time zone). At what time do you need to phone them?