Please provide a short answer for each subpart, i will give a big thumbs up.

Answer the following questions in a few short sentences: a. Why is it standard for years o and 1 to have zero cash flow for an arithmetic gradient? b. Explain to your imaginary, if need be) little cousin why we do not consider sunk costs in economic analysis. c. Describe what makes a new product or service successful. Explain why a product like the Segway was not successful. d. Why is present worth analysis useful in budgeting for large engineering projects