Maintenance on a sailboat varies by the part of the boat. Some aspects require maintenance very few months (as a car does with oil changes, etc.) and others have yearly maintenance requirements. I would suggest determining what parts of the boat require maintenance, on what schedule, and create a log to keep track of. You can find helpful information at http://www.boatsafe.com/nauticalknowhow/boattips3.htm or http://www.essortment.com/sail-boat-maintenance-basic-tips-maintaining-sail-boat-43055.html
The powerboat should pass to the stern of the sailboat to avoid its wash causing a problem for the sailboat To avoid a collision, the powerboat should avoid crossing ahead of the sailboat.
Maintain present course and speed.
Speed up to pass in front of the sailboat
Do whatever is necessary to stay clear of the sailboat.
The question should be "What is aft on a sailboat?" since it is a direction, not a thing. Aft (or after) is anything toward the rear of the boat.
The question should be "When is the sailboat the stand-on vessel...? The answer is if the sailboat has an engine and if it is in operation, the sailboat is treated as a power boat in determining stand-on status. The right-of-way would then follow the rules for power boats.
A sailboat under sail is about to cross paths with a PWC. What action should be taken?
Depends on what your intentions are. If you're planning to work as a company driver, then learning to maintain a vehicle will do you little good, since major fleets don't allow their drivers to perform maintenance on the vehicles.
You should give way to starboard.
The sailboat operator is the stand-on vessel so they should keep their course and speed while the PWC is the give-away vessel so it should change course and speed.
It is not mandatory
the mast should not be moved