This is a subjective question, hence you have to write your answer in the Text-Fleld given below. An enterprise application consists of a 2 node application server cluster connected to a 3 node DB cluster. Over a long period of time it has been observed that an application server node fails every 100 days and a DB server node fails every 50 days. (a) What is the overall MTTF of the 2-tier system? (b) The availability of an app server node is 98%. What is the availability of the app server cluster? (c) If the end to end availability of the 2-tier system is 96.5% and the cost of downtime is USD 20000 per hour, what is the yearly downtime cost?