4. Consider an investment of $100,000 that yields $20,000 after year 1, $30,000 after year 2, $60,000 after year 3, and $70,000 after year 4. (a) What is the payback period? Show enough work to support your answer. (b) Use the algorithm presented in class to find the Rate of Return. Continue the algorithm until the difference between the lower and upper bounds of the rate of return is 0.001. Then take the midpoint of the bounds. Present your work in a table similar to that presented in class with a table number and title, and make sure to reference the table in the text. Report the number of iterations you conducted, the rate of return, and the Present Worth of the Cash Flow using i equal to the rate of return. 4. Consider an investment of $100,000 that yields $20,000 after year 1, $30,000 after year 2, $60,000 after year 3, and $70,000 after year 4. (a) What is the payback period? Show enough work to support your answer. (b) Use the algorithm presented in class to find the Rate of Return. Continue the algorithm until the difference between the lower and upper bounds of the rate of return is 0.001. Then take the midpoint of the bounds. Present your work in a table similar to that presented in class with a table number and title, and make sure to reference the table in the text. Report the number of iterations you conducted, the rate of return, and the Present Worth of the Cash Flow using i equal to the rate of return