Project Summary: Describe the substantiation requirements applicable to writing off the business use of a vehicle (focusing on how to substantiate the business use percentage - what information is necessary), and the two methods used to calculate business auto expenses . Explain your response with two paragraphs of three to six sentences. You MUST include a reference to the applicable IRC section. Write a three to six sentence paragraph which would: (a) include a recommended app to satisfy the substantiation requirements, as well as a brief description of the app; (b) include a link to access the app; and (c) check out an app that a classmate recommended and provide your thoughts. Your recommended app can NOT be the same as any app listed by a classmate.