Pick all that apply

• 1Choice 1.

  It's 10,000. atomic synchronizes property access, so the increment is safe too

• 2Choice 2.

  It can be 10,000 or less. atomic only guarantees atomicity of the getter and setter individually and doesn't protect the whole read, add, write sequence

• 3Choice 3.

  It can exceed 10,000, because setters from several threads run more than once

• 4Choice 4.

  In Swift you get the same guarantee by wrapping the whole read-modify-write in NSLock/OSAllocatedUnfairLock, putting it inside an actor, or using wrappingIncrement from the Atomics package

• 5Choice 5.

  Swift's @Published property guarantees an atomic increment automatically