The supply and demand functions for a generic brand of ink cartridge sold at staples are related by the equations D: q=-6p+80 S: q=9p-40 where p represents the price in dollars for each ink cartridge and q represents the quantity of ink cartridges sold per day a) determine the market equilibrium price and quantity b) if customers are charged a 15% tax, determine the new demand function that relates q, the numberof ink cartridge demanded, to p, the before-tax price per cartridge c)what would be the new demand function that relates q, the number of ink cartridges demanded, to p, the before-tax price per cartridge if in addition to the 15% tax, the government levied a recycling fee of $1.00 before tax per ink cartridge? d) what would be the new market equilibrium price and quantity if in addition to the 15% tax the government levied a recycling fee of $1.00 after tax per ink cartridge