(4) In the early 2020, suppose supply curve of gasoline is Qs = 18 + 2 * P. Demand curve for gasoline moves from its original level Qd = 42 - 8 * P to a new level Q'd = (42-11) 8 * P, where x = N + 2. Here N is the second last digit of your student ID number. How much was the original equilibrium gas price in 2020? And how much was the new equilibrium gas price in 2020? To begin your answer, provide your value of N, x. (This question is only for those who have student ID with the last digit: 0, 2, 4, 6, 8) Tip: For the value of N, you need to get the second last digit of your student ID. For example, if the second last digit of your ID is 1. Then N = 1 and X = N + 2 = 1 + 2 = 3, etc. Your N = ? Your x =