a$)$ The developers at Bright Spark have decided to adopt an Object$-$Oriented approach to the development of its online shopping platform. Discuss the key differences between the traditional and Object$-$Oriented views on Use Cases. $(6)$ b$)$ Explain the purpose of a Data Flow Diagram $($DFD$)$ and how it can benefit the developers at Bright Spark. $(3)$ c$)$ Discuss the three key areas analysts at Bright Spark must organise to conduct effective interviews during the Analysis phase.