Assume the economy is self-regulating and currently is in long-run equilibrium with the price level equal to P5. If something happens that shifts the AD curve to the AD1position, the economy will eventually settle down at a long-run equilibrium point of __________.a. P5, Q3.b. P4, Q4.c. P3, Q3.d. P3, Q5.e. P4, Q2.