2. a. Use the following facts to msess the time-based model of seou rity for the ABC Company, how well does the existing system protect ABC? Assume that the best; average, and worst-case esti mates are independent for each com ponent of the model. Show your detailed calcultion. I Estimated time that existing controls will protect the system from attack = 15 minutes {worst use], it] minutes [average case], and 25 minutes [best case] It Estimated time to detect that an attack is happening = 5 minutes [best case}, 8 minutes [average case] and 1D minutes [worst case] It Estimated time to respond to an attack onee it has been detected = E: minutes [best use], 14 minutes [average case}, and 20 minutes {worst case} b. Given the following possibilities. which slngle Investment would you recommend? Show your detailed calculation and explain your answer. It An investment of 25,006 would change the estimates for protection time to 1? minutes [worst case}, 22 minutes {average easel, and 28 mlnutes {best case). C An investment of $25,006 would change the estimates of detection time to 4 minutes [best use], If minutes {average case} and 9 minutes [worst case}. I An investment of $25,000 would change the estimates for response time to 4 minutes [best case], 9 minutes [average case}, and 12 minutes {worst case}