I'm going to Hongkong & Macau
1/2 day in Hongkong (from HKIA to Victoria Bay, The Peak & Ave of the Stars then to HKG-Macau Ferry Terminal)
2 days in Macau
then go back to Hongkong by morning Macau ferry to HKG-Macau Ferry Terminal & pass by the city for lunch & go to airport

Which card would be suitable for me ?

Can I use Octopus card in Macau ?
Can I use Octopus card to buy ferry ticket ?
Can I swipe the card twice if taking bus for 2 person ?

Thanks.