following argument regarding "Expectation Augmented Phillips Curve" by T (true) or F (false) (1)Oil price hike caused by a war in Middle East shifts Phillips curve. (2)It is useful to explain the stagflation of 1970s. (3)If people rationally expect inflation rate, then expected monetary policy has no impact on unemployment rate. (4)If all other conditions are same, the steeper the Phillips curve is, the higher the sacrifice ratio is