1. Find the internal rate of return for a project requiring an investment of $250,000, where the project promises to provide $85,000 in the first year, $70,000 in the second year, and $100,000 in the third.
2. An investor plans to earn $30,000 next year and $15,000 the year after from two investments, $20,000 now and $20,000 next year. What will be the internal rate of return?