Chapter $15$ Monitoring and Auditing IS $3.(8$ marks$)$ What is an operating system $(3$ marks$)?$ What are the five fundamental control objectives of an operating system $(5$ marks$)?$ Use a full sentence to describe each one. $4.(8$ marks$)$ Explain a black box audit approach $(3$ marks$).$ Explain a white box audit approach $(3$ marks$).$ How do they differ $(2$ marks$)?$