Can you help answer these questions and show work?

1.You are considering buying an oil field.If you buy the field, you can extract the oil in one year.There are 100 barrels of oil that can be extracted from the field; the cost of doing so is $4,000.You expect the price of oil in one year to be $50/barrel.However, there are four equally likely prices of oil in one year: $20/barrel, $35/barrel, $40/barrel, and $105/barrel.

If your discount rate is 15%, how much are you willing to pay for the field?Assume the price of oil never changes after one year.

2.You are considering buying an oil field.If you buy the field, you can extract the oil in one year.There are 100 barrels of oil that can be extracted from the field; the cost of doing so is $4,000.You expect the price of oil in one year to be $50/barrel.However, there are four equally likely prices of oil in one year: $20/barrel, $35/barrel, $40/barrel, and $105/barrel.

If your discount rate is 15%, what is the value of the option to not drill when the price of oil is too low?

3.A stationery company plans to launch a new type of indelible ink pen. Advertising for the new product will be heavy and will cost the company $8 million, although the company expects general profits of $280 million next year from sources other than sales of the new pen. If the company has a corporate tax-rate of 35% on its pretax income, what effect will the advertising for the new pen have on its taxes?

4.A company planning to market a new model of motor scooter analyzes the effect of changes in the selling price of the motor scooter, the number of units that will be sold, the cost of making the motor scooter, the effect on Net Working Capital, and the cost of capital for the project. They predict that the break-even point for sales price for the motor scooter is $2,480. What does this mean?