Please answer all parts and explain. i have asked this question 2 times on chegg and i been getting the incorrect answer. for part A the anser is 60 million

Part A

Suppose that software costs capitalized for a company are $48 million in 2016, $72 million in 2017, and $53 million in 2018. If the useful life of the software is 2 years, how much is amortization in 2018? (Assume that when a software investment is made in a year, it is amortized equally over the next two years. For example, if the investment is made in 2016, 50% of it is amortized in 2017 and 50% is amortized in 2018.)

Part B

Building on your answer to Part A, what is the net value of the software development asset as of the fiscal year ended December 31, 2018?

Part C

Ignore the information provided in Part A. Suppose that a company capitalizes software costs of $35 a year for each of the last 6 years ending in 2018. If the useful life of the software is 5 years, how much amortization expense would the company record for the fiscal year ended December 31, 2018? (Assume that when a software investment is made in a given year, it is amortized equally over the next 5 years. For example, if the investment is made in 2012, 20% of it is amortized in 2013, 20% is amortized in 2014 and so on.)

Part D

Building on your answer to Part C, what is the net value of the software development asset as of the fiscal year ended December 31, 2018?

Part E

Now suppose that a company capitalizes software costs of $35 a year for each of the last 13 years ending in 2018. If the useful life of the software is 12 years, how much amortization expense would the company record for the fiscal year ended December 31, 2018? (Assume that if a software investment is made in a given year, it is amortized equally over its useful life beginning in the next year. For example, if an investment with a 10 year useful life is made in 2008, 10% of it is amortized each year for the ten years from 2009 to 2018.)