ارسم لي هذا المخطط بصورة صحيحة

[Zahra]

(Tape R1) ← Process B ← (Printer R3) ← Process A ← (Tape R1)
↑ ↓
(Disk R2) ←───────────── Process B

[steveroush]

digraph please {
 {
  rank=source
  edge [dir=back]
  T [label="(Tape R1)"]
  PB[label="Process B"]
  P [label="(Printer R3)"]
  PA [label="Process A"]
  Tx [label="(Tape R1)"]
  T->PB->P->PA->Tx
  }
 {
  rank=sink
  D2 [label="(Disk R2)"]
  PBx [label="Process B"]
  D2 ->PBx
 }
 T-> D2 [dir=both]
}

Giving: