Im a complete noob when it comes to this sc2 trigger system so I need a lil help with a few different triggers. Thx for the help in advance

1: How do I go about having units enter a bunker.

2: I need to have a single random unit from region A be moved instantly to region B, however the units in region A may not always be the same units if that matters.

3: Can I have a building build a certain unit every 30 seconds and then as soon as that unit is done building have it issued a patrol or attack command?

1) There's a "cargo" action trigger.