20.1 The task is to develop a public transportation SoS. Given the four different components to use: buses, light rail (aboveground), metro (below ground), and ride share services, develop a context diagram to show the interdependencies between the four parts. The diagram should include three nodes for each part (e.g., three bus stations), and each node should have at least two connections: one within the same modality and one outside the modality. An example is busbus connection and busmetro connection. Describe the interdependencies on the services or products that are exchanged.