how far is causeway bay to queen elizabeth stadium, hk city hall concert hall and hk cultura centre?

Dear Sir/Madam, I plan to accompany my daughter to hongkong for a choir festival. The choir festival will be held in 4 locations : Queen Elizabeth Stadium Area, Hong Kong City Hall Concert Hall, Hong Kong Cultural Centre Concert Hall and Tsuen Wan Town Hall Auditorium.

My question are :
1. How far is causeway bay to the four festival locations that I stated above? Since I plan to stay in causeway bay area.
2. If you think that Causeway bay is so far / quiet far to the four festival location, is there any recommendation transportation that I can use, mrt/taxi, for example? And please kindly inform the approximate time that need for each destination from cause way bay..
3. If you think that causeway bay is so far/quite far to the four festival location, is there any recommendation area that I should stay that easier / nearer to the four festival location?
4. What is the district / area name of Queen Elizabeth Stadium Area, Hong Kong City Hall Concert Hall, Hong Kong Cultural Centre Concert Hall and Tsuen Wan Town Hall Auditorium.

Thank you for your kind help. Look forward to receiving your reply.