11-4. EditingCorrect this conversation. There are four mistakes. The first mistake is already corrected.A: Hey! I have a new job.B: Really? Where do you work ?A: At a bookstore.B: What do you do?A: I'm a salesperson.B: Do you like this work ?A: Yes. It's challenging.B: Challenging? I don't know that word. Whst does challenging means ?A: It means "hard but interesting."