I want to put a subpanel in my garage. Off of the subpanel, I want two circuits.
1) 15 amp circuit for some standard electrical sockets.
2) One 240v circuit to power this air compressor:

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Questions:
1) What amperage should I make the breaker in the main panel that leads to the subpanel?
2) What gauge wiring should I use from the breaker in the main panel to the subpanel?
3) What amperage should I make the main breaker in the subpanel? I assume it should be the same as #1.
4) What amperage should I make the breaker for the 240v air compressor circuit?
5) What gauge should I make the wiring from the breaker for the air compressor circuit to the socket for the air compressor?
6) What type of sockect (and pigtail) should I use for the air compressor?