·       As explained throughout this course, entity relationship modeling is a critical element of database design. If the database is not properly modeled, it is unlikely that the database will be properly developed. Using this knowledge, explain the key reasons why entity relationship modeling is important, and determine at least (1) way in which it impacts the overall development of the database.

·       Analyze the key ways that entity relationship modeling helps database developers overcome potential design challenges and conflicting goals.

·       For the database that you described in the Week 1 and Week 2 discussions, determine the major / minor challenges that might exist when you are creating an entity relationship diagram (ERD) for the business function / operation.

select one of the following methods (P1 Payback period, P2 Accounting rate of return, P3 Net present value or P4 Internal rate of return) and briefly discuss how the method can be used to solve a present day financial or business problem. 

I just need at least 2 paragraps explaining how ONE of these methods (P1-P4 pick one) can be used to solve a present day financial or business problem.