Resident Evil 6 pc) leon comaign Walkthrough Chapter 4 (welcome to china)

my pc system specs : -GPU : nvidia geforce gt520 2gb DDR3 -CPU : E2220@ 2.40GHZ -RAM : 3gb DDR2 chapter 4 : china -objective 1 :defeat the B.O.W -objective 2 :find the cause of the anomaly -objective 3 :stop the plane from the crashing -objective 4 :help sherry and jake -objective 5 :go after "Derek Simmons" -objective 6 :find the 3 keys -objective 7 :undo the locks on the barriers -objective: 8 :track "Ada Wrong" FACEBOOK :   / khalil1000gb