Pick all that apply

• 1Choice 1.

  Only the thread that took a mutex can release it, but a semaphore can be signaled from a different thread

• 2Choice 2.

  With an initial value of N, a semaphore lets at most N threads into the critical section at once

• 3Choice 3.

  Waiting for a result with DispatchSemaphore.wait() at an await point in Swift Concurrency is a safe pattern

• 4Choice 4.

  A semaphore with a value of 1 has exactly the same semantics as a mutex

• 5Choice 5.

  If the thread holding an NSLock calls lock() again, it deadlocks