can I get help with this questions

Question 8 - PE Sports (5 marks) PE Sports a small business that reports annually on 30 June each year. On 1 January 2015 the business purchased a new Van for $60 000 plus GST. The following graph was prepared to demonstrate the Van's Carrying Value at the end of each year over its useful life using alternative depreciation methods. Tami has decided to select Series 1 to depreciate the Van. a. Calculate the estimated residual value of the Van at the end of its useful life. 1 mark b. Explain the conflict that exists between the qualitative characteristics of relevance and verifiability in terms of whether depreciation should be included in reports. 4 marks