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Which of the following statements are true? I. AsingIe-price monopolist is a price- maker and faces a horizontal demand curve. II. For a monopolist. marginal revenue captures both price effect and output effect. III. A single-price monopolist that maximizes prots produces in the elastic part of the demand curve. 0 II and III are true 0 only III is true 0 I. ll. and ill are true 0 only II is true 0 only i and II are true Which of the following are examples of price discrimination? I. Theatres charging different prices for different seats ll. Economic Science Association charging a membership fee and an attendance fee for each conference. \"I. iPhone has different price than Samsung 0 Only in 0 Only I 0 Only I and || 0 I. II. and III 0 Only Ill