please ans. the both questions. its a request please....

3-You are a managerial accountant in ABC firm, you have been asked to Calculate the annual depreciation for an asset that costs $200,000 and it is expected to have a life of five years and have a resale value of $40,000 at the end of that time.? .......(3marks) 4-Assume that the firm has sales of $3 million and debtors of $400,000. as an accountant;Calculate the days' sales outstanding.? interpret the meaning