The results of the shirt sales research are as follows: Demand Function: P = -600Q + 180,000 Supply Function: P = 400Q + 90,000 a. If the government imposes a tax of Rp.10,000 per piece, calculate the equilibrium price and quantity after the tax. b. Calculate the tax borne by consumers! c. Calculate the tax borne by producers! d. Calculate the tax revenue received by the government from these shirts