409 Problem 3 and Problem 5a. Please name your file as your last name + first le

409 Problem 3 and Problem 5a.
Please name your file as your last name + first letter of your first name+_HWK5. If you fail to do it, you will lose 5% of the homework grade for this assignment. For example, my file is zhangy_HWK5
Only turn in excel file. If you need to answer questions, please do that in the excel file too. Please number the problems and part a, b, c, etc clearly. For example, problem 1, will be numbered as 1a), 1b)….etc.