IT management

in IT management class and we have discussion board that we need to participate in, so here are few of questions that I need answers to, I just need one or two sentences in each of the question: Question 1: Why is it important to be able to analyze
IT costs by accounting, asset, service, and technology tower views? Question 2: What is the key difference between incremental budgeting and zero-based budgeting? Question 3: Explain how total-cost-of-ownership and service costing are related.