Answer to Question 1
An architectural view is a representation of the system that is shaped by four factors: what, who, when, and where. By representation we mean modeling in a very broad sense, as the systematic representation of the relevant features of a product or a system from particular perspectives. The difference between a model and an architectural view is that the latter may consist of one model or several. Views may also share models.
Answer to Question 2
The three primary roles of the systems analyst are consultant, supporting expert, and agent of change.