Text book system Enginering and Analysis 3 edition by Benjamin S. Blanchard

I like to have some answer to this problems or just help me to find how to do it.

This is in page 396

2. Why is reliability important in system design? When in the life-cycle process should it be considered? To what extent should reliability be emphasized in system design, and what are some of the fctors that govern this?

3. What are the quantitative measures of reliability (discuss measures for hardware, software, personeel, facilities, and data)?

4. Define operational availability, achieved availability, inherent availability, system effectiveness, and cost effectiveness.