The quantity demanded of a certain electronic device is 8000 units when the price is $260. At a unit price of $200, demand increases to 10,000 units. The manufacturer will not market any of the device at a price of $100 or less. However for each $50 increase in price above $100, the manufacturer will market an additional 1000 units. Assume that both the supply equation and the demand equation are linear.

(a) Find the supply equation.

(b) Find the demand equation

(c) Find the equilibrium quantity.

(d) Find the equilibrium price.