Reach hong kong airport at 5am from Wan Chai

Hi All

My flight is at 7am and would like to reach the airport around 5am. I will be from Wan Chai area, iClub Hotel. I roughly know there is a bus N11 that goes to the airport or taxi and I dont think the Airport Express bus has started at 4am.

Anyone has any other suggestion for alternative routes?
How long does N11 take from around Wan Chai MTR area (iclub hotel) to airport?
How much is the estimated taxi fare from Wan Chai to airport at around 4am and how long is the ride?

Thanks!