$3.$ What are three typical reasons why companies develop their own information systems? $4.$ What are user applications? Suggest three examples that could boost user productivity. $6.$ What is an RFP$,$ and how does it differ from an RFQ$?$

$7.$ What is the purpose of a bench mark test? Suggest at least two examples of benchmarks

$10.$ Explain the relationship between logical and physical design.