Transport options and prices for Macau - Zuhai - Shenzhen - Hong Kong airport

Question 1. Please advise the best way to get from:

a. Macau to Zuhai
b. Zuhai to Shenzhen
c. Shenzhen to HK airport

Please include bus and train and ferry - the prices and scheduling.
Also, does the bus and train arrive centrally in each city?
How far would the ferry terminal be from the centre of each city? This is for a trip in December 2012.

Question 2. Please advise the distance between Macau and Zuhai and Zuhai and Shenzhen - keen to get an idea of travel time between these cities.

Thankyou.