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6. [Supply and demand] Using the hypothetical data for gasoline below, answer the following questions. Price Quantity demanded Quantity supplied (PHP per gallon) (millions of gallons) "millions of gallons) 3 15 50 10 80 5 Un 110 6 0 140 a. Derive the equations for supply and demand and calculate equilibrium price and quantity. (Note: The independent variable "price" is drawn on the y-axis.) b. The government imposes a price policy capping the price of gasoline/gallon at PHP 8. Calculate the shortage/surplus and the change in supplier revenue as a result of the new policy. c. The government imposes a price policy capping the price of gasoline/gallon at PHP 1.5. Calculator shortage/surplus amount and the change in supplier revenue as a result of the new policy