Need expert who well know VaR model

The task you are given is to estimate the market risk for a 2 year Commonwealth government bond, held on September 2 , 2021 (you are working out the risk position assuming that you own the bond at the close of trading the previous day). You will do this by estimating the Value-at-Risk for the bond. This will require you to choose the best VaR model by backtesting several methods to determine the most reliable for the task at hand.