How many entrances does the second last floor of dawood rangan tower have?

im looking to write a review comparing it to chongqing and how that map wasnt as well designed but dont have the game on me? how many ways to get to that floor are there? From what I remember:

  • two stairwells in dawood’s office
  • one stairwell near the studio
  • pipe accessed from stairs near taxi start
  • pipe near stairwell near studio
    Am I missing any or gotten one wrong?