Firms X and firm Y are maximizing profits. At their respective profit-maximizing price, Firm X's own-price elasticity is -2 and Firm Y's own-price elasticity is -3. Which statement is correct?

1. Everything else held constant, if firm Y increases its price it will lead to an increase in its revenue

2. Firm X's consumers are more price sensitive than firm Y's consumers

3. Firm X is a price taker

4. The share of markup in the optimal price (Lerner Index) for firm X is equal to 50%

5. Firm Y can charge a higher markup than firm X