Suppose you are managing your companys network security. For each suspicious user activity, you need to decide whether or not to assign a human expert to check if it is malicious. Suppose that a human expert, once being assigned, can stop a malicious activity. The cost of assigning a human expert to check a suspicious activity is $1. The net benefit of stopping a malicious activity after factoring in the cost of assigning the human expert is $5. The cost of not stopping a malicious activity is $50. A non-malicious activity will not cause any loss to the company. a. Write down the decision weights in the following table. Specifically, please write down the value of a, b, c, d. Note that for the actual class, 1 means malicious and 0 means not malicious.

(Short-answer) b. Continue from the previous question. What is the decision cut-off value you should use to decide whether to assign a human expert? Show calculation. Then write down the decision rule as well.

	Decision
Actual class	ASSIGN	NOT ASSIGN
1	a	b
0	c	d