Find the Hidden Ammo in the abandoned part of the station on the QUARANTINE level. [Bronze / 15G]

Location: Quarantine
A few minutes after the Quarantine chapter starts, you will go past a crowd of people. In the next room are 4 ammo stashes. You have to find all 4 of them.
#1 - Behind the entry door (go down the stairs so the door closes and you can reach the ammo)
#2 - Go down the stairs and look behind a window
#3 - On the far left side of the corridor
#4 - In the same corridor, but on the right side (just a few steps away from the previous ammo stash)