Can you help me with these questions? Thank you

1. The practice of charging different prices to different consumers for similar goods is called:

• Bundling
• Two-Part Tariff
• Rebates
• Price discrimination

2. A suitable definition of an industry is:

• when firms collude in markets
• a group of firms producing products that are close substitutes, that might be related by technology
• when governments pick national champion firms
• a cooperative of buyers

3. Demand is relatively inelastic if:

• The good is a luxury
• There are few close substitutes available
• The consumer has a long time to decide
• All of the above

4. A firm can increase its revenue by increasing price if:

• The good it sells is relatively inelastic
• The good it sells is relatively elastic
• The consumers of the good are responsive to changes in price
• All of the above

5. Which of the following is not a characteristic of a perfectly competitive market?

• Each firm in the market sells a somewhat different variant of the good
• There are many sellers, each of which sells only a small fraction of the total quantity exchanged
• Each firm in the market is unable to influence the price of the good it sells
• Sellers face no barriers to entry and can easily enter the market to compete