A system has n resources R0, …, Rn−1 and k processes P0, …, Pk−1. The…

A system has n resources R0, …, Rn−1 and k processes P0, …, Pk−1. The resource-request logic of each process Pi is:

if (i % 2 == 0) {
  if (i < n) request R_i
  if (i + 2 < n) request R_(i+2)
} else {
  if (i < n) request R_(n-i)
  if (i + 2 < n) request R_(n-i-2)
}

In which one of the following situations is a deadlock possible?