3. State one advantage of using a Vector Autoregression (VAR) model. [1] 4. In the following VAR model, write down the null hypothesis for the Granger causality test of y2 does not Granger cause y.? [1] W = 20 + B + B272- + 1-2 + 12721-2 + 1-3 +8272-3+ Y = 30 + Bau-+ + P22921-1+Y21:13-2 +Yz2Y21-2 +8,1V1-3 +822921-3 + 5. In a VAR model, name the method of analysing the proportion of the movements in the dependent variables that are due to their "own" shocks, versus shocks to the other variables. [1]