Can someone help me solve "PART A" in this problem. Having a hard time getting started and making a timeline in order to find the Approximate Annual Dollar Weighted Yield. Thank you for your help.

P.S. if you're feeling ambitious feel free to do more, I'll definitely give you a thumbs up for your help. :)

You contributed 25,000 on Jan. 1, 2013 in a fund. On Jan 1, 2014, your fund balance was 24,000 and you deposited 2,000 immediately. On Jan 1, 2015 your fund balance was$ 28,000 and you withdrew 10,000. On Jan. 1, 2016 your fund balance was 16,000, and you invested additional $8,000. On Jan. 1 2017, your fund balance was 30,000. For the 4-year period(2013-2016) a) Find the Approx. Annual Dollar yield (6 decimals) b) Find the Exact Annual Dollar-Weighted yield (6 decimals) c) Find the Annual Time-Weighted Yield for the fund (6 decimals) d) Using the Exact Method of Equated Time, find the single point of time Tat which a single Contribution C (Net of all contributions above) that is equivalent to all the transactions e) Same as (d) but use the Approximate method to calculate T