Number 1 (weight 25%) The following shows the Supply function and Demand function as follows: 3q-200p + 1800 = 0 and 3q + 100p-1800 = 0, where the price per unit is in dollars and q is the number of units sold in a certain period. b. Find the equilibrium price when the tax of 27 cents per unit is imposed on suppliers! Number 2 (25% weight) Population of the city of Sabang-Aceh 30,000 inhabitants, with a growth rate of 3% per year. a. Determine the equation that gives the population t years from now b. How much is the population three years from now (rounded numbers)? Number 3 (weight 25%) The accounting department is calculating the company's loan for the purchase of a Wuling Cortez car as a company operational vehicle for Rp. 235,000,000, - which is amortized for 60 months with an interest rate of 8% per year which is calculated on a monthly basis. B. What is the amount of the monthly installment payment? B. What is the amount of interest or the total nominal interest paid? Number 4 (weight of 25 %) It is known that a product has a demand function f (Q) = P = 5 -0.005Q and a supply function g (Q) = P = 0.5 + 0.01Q. Based on these data, answer the following questions: a. Calculate the amount of consumer surplus and producer surplus! B. Make a graph of consumer surplus and producer surplus in one diagram!