Econometric assignment on Eviews

Hello,
I would like to conduct a long run (1970q1-2014q1) time series analysis on Eviews with the current account balance as the dependent variable. I did a unit root test on the variables and two of them are integrated of order I(2). I don't know how to overcome this obstacle, also i think the ARDL model does not provide for an analysis of I(1) and I(2) integrated variables. Could somebody help me with the correct methodology, which included also a structural break approach, the regression analysis along with all robustness tests and the interpretation of the results. Attached you have the variables I want to include. Thank you