Compute Yield on following dates:

1.You are an original allottee where buying price is the issue price and you're selling on maturity. (Allotment date is 25-Jan-2012)

2.Peak price date- You are an original allottee where buying price is the issue price and you are selling on peak price date. (In this case peak price date is 18-Aug-2016)

3.On last available trading date- buying on 31-Mar-2020 and selling on maturity.

4.Current yield on last available trading date (31-Mar-2020).