please answer my tutorial

2. A large share of the world supply of diamonds comes from Russia and South Africa. Suppose that the marginal cost of mining diamonds is constant at $2000 per diamond and the demand for diamonds is described by the following schedule: a. If there were many suppliers of diamonds, what would be the price and quantity? b. If there was only one supplier of diamonds, what would be the price and quantity? 3. Externality is one of the sources of a market failure. An intervention to correct it would be to 'internalise the externalities. Explain what that means and provide an example. 4. What is transfer payment and how can it be used to correct market failure? 5. Why is transfer payment not included in the calculation of GDP? 6. How does the government of PNG intervene to regulate prices in PNG