i need the correct answers from the options

Question 1 (1 point) Saved Which type of intrusion detection system (IDs) can be considered an expert system? Network-based Host-based Behavior-based Knowledge-based Question 4 (1 point) What is the first step of the business impact assessment process? Risk identification Resource prioritization Likelihood assessment Identification of priorities Saved Question 9 (1 point) If Anna receives a digitally signed message from Kristoff, what key does she use to verify that the message truly came from Kristoff? Kristoff's public key Anna's private key Anna's public key Kristoff's private key