Question 3. In a network-based intrusion detection system, two nodes Aand B monitor inbound traffic. The two nodes are providing a centralnode C with alarm signals and C classifies the threat level based on thisinformation. The alarm signals can be one of the four types P1, P2, P3, orP4. Assume that all four alarm signal types occur with equal probability.The classification carried out by C when receiving one signal from A andone from B at a given time is according to the following rule:Threat levelSignal typesOne P1 signal + One P2 signal(a).(b).(c).LowMediumHighSevereOne P2 signal + One P3 signalOne P3 signal + One P4 signalTwo P4 signalsgenerate.List all the possible pairs of alarm signals that A and B canGiven that at least one of the two monitoring nodes gener-ates an alarm signal P3, what is the probability that C will classifythe threat as "medium"? Justify your answer.Given that at least one of the two monitoring nodes gener-ates an alarm signal P4, what is the probability that C will classifythe threat as "severe"? Justify your answer.

(a) 1. P1 + P1 2. P1 + P2 3. P1 + P3 4. P1 + P4 5. P2 + P1 6. P2 + P2 7. P2 + P3 8. P2 + P4 9. P3 +…

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