I am a movie director and I just received the following movie plot. Could you help me answer this question? If not, let me know by writing "Not answerable". Plot title: Surveillance Movie plot: A series of violent deaths and the disappearance of a young woman bring FBI agents Hallaway (Bill Pullman) and Anderson (Julia Ormond) to a town in rural Nebraska. They meet the three survivors of a mysterious bloodbath; the young Stephanie (Ryan Simpkins), the cocaine-addicted Bobbi (Pell James), and the foul-mouthed police officer Bennett Kent Harper. Hallaway watches the trio's respective interviews with Captain Billings (Michael Ironside) and officers Wright (Charlie Newmark) and Degrasso (Gill Gayle), where they tell the story of what brought them there: In a warped way to pass the day, officer Bennett, Kent Harper as his partner officer Conrad (French Stewart) watches (and both hidden from view), shoots the tires of cars driving along an isolated county road, then convince the drivers their tires blew out as a result of their speeding, and threaten them afterwards. They do so to one young couple then let them go. A bit later, Stephanie, traveling on vacation with her family, sees a car (the couple's) with blood on it and tells it to her oblivious mother (Cheri Oteri). Bobbi, using drugs with her boyfriend Johnny (Mac Miller), is in a car right behind them. At a rest stop, both gals learn a pair of killers are responsible for a string of murders and likely the woman's disappearance. Stephanie's stepfather Steven (Hugh Dillon) supposedly speeds and their car's tire is shot by Bennett. Bobbi and Johnny are about to offer help, but the officers arrive and harass all of them, making Steven put Conrad's gun in his mouth and making Bobbi swear at Johnny. After all of this, Stephanie tells the officers about the bloody car she saw earlier. The officers leave to investigate. Steven gets to work changing the tire, and Bobbi gets out to talk with Stephanie's family, who all feel violated by the officers. Simultaneously, after passing a white van, Bennett and Conrad find the car Stephanie described further down the road, with evidence of an altercation, and race back towards the van. The van plows into the back of... My question: How old is Stephanie?
The answer to this question is:
Not answerable