Advanced Semiconductor Materials Lithography (ASML) is a monopolist in extreme ultraviolet (EUV) lithography systems used to produce computer chips. Its marginal cost of production c is 1 billion per unit. Small chip makers demand 4 units and are willing to pay 10 billion each, whereas large chip makers want to buy 6 units at a maximum 20 billion each. ASML also produces a UV system, a slower version of the EUV system, at a marginal cost c'=1.5. The two types of chip makers are willing to pay 12 and 8 billion for one UV system, respectively. O Selling EUV units at 20 O Selling UV units at 10 O Selling EUV units at 12 and UV units at 8 O Selling EUV units at 16 and UV units at 8