1) An intersection consists of two streets that cross at right angles. Each street has one or more lanes in each direction and possibly (G2) designated left turn lanes. The system has the following components: a. Traffic semaphores (signal lights) i. Standard semaphores with three lights: red, yellow, and green ii. Left-turn semaphores with three lights: red, yellow, and green left arrow (G2) iii. Combined semaphores with five lights: red, yellow, green, left-turn yellow, and green left arrow (G2) Note that there is one or more semaphore for each direction of traffic flow. b. Traffic sensors: A traffic sensor is embedded in each lane near the intersection. It reports the presence or absence of a vehicle over the sensor. c. Pedestrian semaphores (walk / don't walk signals) (G2): Pedestrian semaphores may be placed at the corners of the intersection, one for each street, to indicate when it is safe for pedestrians to walk across the street toward a particular semaphore. d. Pedestrian push button (G2): Pedestrian push buttons may be placed at the corners, one for each street, so that pedestrians can request that the lights cycle so they can safely cross the street in a specified direction. The signals operate in a conventional fashion. Traffic is allowed to move on one street and then the other, alternately. In normal operation, each cycle in a fully configured system precedes as follows: If traffic is waiting in the left-turn lanes in both directions on a street, then both left-turn signals cycle green after which both signals cycle to full green with the turn signals off (or red) else if traffic is waiting in only the left-turn lane in one direction, then the left-turn and through signals for that direction cycle green after which both signals cycle to full green with the turn signals off (or red) else both signals cycle full green. The pedestrian semaphore cycle consists of the signals "walk", flashing "don't walk", and then "don't walk". The pedestrian semaphore will signal "don't walk" whenever any lane on the associated street has a green light or a left-turn signal allows traffic to turn into the street. The signal will cycle from green on one street to green on the other street or to allow turns, only if there is traffic at a sensor on the street or turn lane for which the signal is red. a) Who are the key stakeholders involved in the following stages of the system lifecycle (18 marks): i) Design (eg, document process/system and organizational requirements) ii) Acquire (eg, purchase off-the-shelf software) iii) Build (eg, write custom software, configure acquired software, customize acquired software, build interfaces, testing) iv) Implement (eg, training, pilot, rollout, feedback) v) Ongoing use vi) Post-implementation improvements b) Which IE or IT tool(s) would you recommend using at what stage(s) as the best way to analyze and present this system to stakeholders? Why? (18 marks) c) Suppose you are working as an engineer for the City responsible for managing this project. The Director of IT feels the best way to understand and present the system design is through use of UML. Draw a use case diagram and a class model with classes and associations. What are the advantages and disadvantages of using these 2 diagrams as a starting point to the project? How does this differ from your response to question b) above (if it does differ)? Wh or why not does it differ? (36 marks) d) As an engineer working for the City, what other factors do you feel, if anything, are missing from the system depicted in this problem (eg, relative to the implied process, environment, infrastructure, organizational support)? (18 marks) e) If you feel there are other factors, how would you cost-justify any additional considerations described in your response to question d) above? Give concrete examples. If you do not feel there are other factors, explain why not (10 marks)