Deus ex human Revolution hostage situation?

so in one of the first REAL missions for deus ex human revolution im asked to handle a hostage situation so i played through the mission but i couldn't find where the hostages are. I need help cause i really want to find them do i have to go there lethal or non lethally. And if not where am i supposed to look. (i would like specifics)Deus ex human Revolution hostage situation?
Actually there are a number of other hostages that you can rescue on that mission. In one of the assembly line rooms (large room with the benches and L-shaped workstations), there is an upper area with only an office in it. This one is just before you enter the hallway with the cameras and two guys in the break-room watching TV. Inside the office will be the hostages, but they will warn you not to enter through the door; the bomb sitting in the middle of them also helps point out that fact. You can choose to go in through the door, but in order to rescue the hostages, you have to enter the room through a different way; there is a vent on the back wall of the office which provides a clue. Back on the other side of the main room is a vent which will eventually lead you to the vent behind the office.Deus ex human Revolution hostage situation?
Theres only one hostage that can be saved and if you follow the x you'll find herDeus ex human Revolution hostage situation?
Actually there are other hostages u can save in that mission:

first of all, before entering into the plant, u can see a number of SWAT police, ask the black guy ( the only one who u can see not wearing his helmet). Select for conversation allows u to get information on this mission, including where the hostages are. He will TELL you.

if that is still a problem, no worries!
Progress the mission as you would, until find a room where u can hear conversation between terrorists arguing about how to handle the dead body after killing one of the hostages (or police), As follows like this:

"no way i am gonna end up in jail because of this"
"he deserves it!"
"...find something to cover his body"

something like this....(sorry for bad memories, but i think that's enough since there is only 1 place in this mission where u can hear this kind of conversation.
That is the room where u find hostages.

Not sure if there is only 1 ways to enter the room (maybe more but i found 1), The door at the second floor.

There are 2 ways to save hostages:

1. Take every enemy down (lethal or non, your call), then go on the stairs which is in the OPPOSITE side of the room to where u head in, Second floor. Find the second floor where the hostages are, save them. (there are only 2 second floors, one is where u head in, hostages are on another.

2. Second way is a cheap shot, once u enter the room if u can manage to get downstairs without getting noticed, that's wonderful. then find your way to RIGHT HAND SIDE to where you are facing when you just got in. just under the stairs, there is a metal box move it then there is a secret path leads you straight to the hostage room. (for your information, during your time moving through secret path you will be sent to move across the top of a pipe ceiling, don't drop lol).

Either way once u get into that room, there is no way turning back, destroy the bomb is your only option. You can either destroy through explosives or hacking to shut it down, it is your call, BUT YOU ONLY HAVE AROUND 25 SECONDS AFTER YOU ENTER THE ROOM.
Note: if u chose explosives to destroy the gas bomb, punch the guy siting just next to the table, don't kill him since u are here to save them, this allows u to drag him away from the bomb on table (otherwise u can't move him) Then plant your explosives. if you don't move the guy, he will be killed by your explosives ! and mission failed. Explosives method will attract a lot of attention, thus takedown enemy before u do this, or u will just get busy on this. It won't change the story if you use this method to save hostages since the guy you punch will give some "repay" later on (mention later), u can still talk to him because SWAT will wake him up :) after the mission is finished.

Save them, u are a hero.

OH, after saving them, u can chit chat with the worker sitting next to the table (mentioned before), he will ask u to save his wife (the hostage Zake holds, name Josie). if you save BOTH of them husband and wife, chat with them before heading to Malik, They will say they will repay u. After this if u log onto Jansen's (or YOUR) computer you will see a e-mail from Josie and his husband, inviting u to their house. Then they will introduce you to another weapon dealer other than the 2 guys in the gas station for permanent discount (discount cuts over 50% it is quite amazing).

Enjoy the game, it is really good! Yeah i guess i spoil too much :)