(3-10pts) Specify a conceptual model in the form of a UML class diagram for an international journey planner system, which provides information on travel routes and options between two places anywhere in the world. Given two places, identified by name and country, and optional restrictions on the maximum total cost, duration, and number of segments the traveler wishes to travel, the system outputs a list of one or more routes that meets the requirements. Each route consists of one or more segments, each segment has a start and end point, a mode of transport (e.g., aircraft, bus, ferry, train), and cost and duration. For each transport, there is also information on the company that provides the transport and any restrictions, such as deadlines for booking