Can you help me these questions? Thank you

1. Concentration can be measured by:

• the Herfindahl-Hirschman Index
• the Heimlich index
• the number of buyers in the market
• how much of an industry's output if bought by a single buyer

2. The primary objective of most private firms is to:

• Maximise revenue
• Maximise profit
• Minimise cost
• Maximise output

3. Medical supplies which people can't do without represent goods with:

• low price elasticity of demand
• no market power
• high price elasticity of demand
• elastic competition

4. A market is a:

• Group of firms producing products that are close substitutes
• Group of firms related by the same production technology
• A place where goods and service are produced
• A place where buyers and sellers meet to exchange goods and services