Middleware and Distributed Systems (IN2259)

The problem centers on developing a Restful API for effectively managing staff, their offices, and 
allocated courses within the Faculty of Computing and Informatics. These offices can 
accommodate multiple lecturers. A lecturer is characterized by essential attributes, including a 
staff number, office number, staff name, title, and a list of the courses they are teaching. 
Additionally, a course is characterized by specific details such as the course name, course code, 
and NQF (National Qualifications Framework) level.
The API should include the following functionalities:
• Add a new lecturer
• Retrieve a list of all lecturers within the faculty.
• Update an existing lecturer's information.
• Retrieve the details of a specific lecturer by their staff number.
• Delete a lecturer's record by their staff number.
• Retrieve all the lecturers that teach a certain course.
• Retrieve all the lecturers that sit in the same office.
Note that the staff number should serve as a unique identifier for a lecturer.
Your task is to define the API following the OpenAPI standard and implement the client and 
service in the Ballerina language.
Deliverables:
• OpenAPI specification in YAML or JSON format.(15 marks)
• Client Implementation in a Ballerina that effectively interacts with the designed API.(10 
marks)
• Service Implementation (25 Marks)