At the price of apples of IDR 13,000 per kg, the demand for these apples is 400 kg, but at when the price of apples increases to IDR 15,000 per kg, the demand for apples will decrease 300 Kg, In this condition, the producer sells 800 kg of apples at a price of IDR 10,000. Because it is not yet the harvest season, the producers increase the selling price by the price IDR 11.000,- with the amount sold as much as 1000 kg 1. What is the demand function and the supply function? 2. What is the price and quantity at equilibrium? 3. If a tax of IDR 5,000 is imposed, what is the price and amount per unit? new balance? 4. If a subsidy of IDR 3,000,- what is the price and quantity on balance new Note: Rounding off two destruction after the comma