(b) Lately, time-to-market has become the dominating factor for industrial success, this places an enormous pressure on manufacturers and developers to find more efficient means of producing high-quality software for their products. At the same time, today's embedded applications are becoming more complex. Explain and justify FOUR development phases of SDLC shown in Figure 2. Time left 2:34:44 Request for systems development 1.0 Systems survey Approved feasibility. document Systems 2.0 Structured Analysis systems analysis Miscellaneous External sources environmental information Physical requirements Logical specification Available hardware 3.0 Systems 4.0 Structured systems design Systems Design Approved systems design document Request for proposal Vendor proposals selection Approved configuration plan Hardware and software vendors Contract Purchased software 5.0 Systems implemen- tation Systems Implementation [10 marks]