Create a user case diagram of the book circulation software system in the Cook’s Library (previous week problem). Add another actor called accountant who take care of fines of late return or lost book/s and maintains library membership. Write text description for each actor use cases.

Create a use case diagram of a student online course handling portal like canvas. Write text description of each use case.

Create a use case diagram of a student online course registration portal like soar. Write text description of each use case.