Draw a state machine diagram to represent the possible states and transitions for a Job object, as described below (5 marks):

A plumbing job at Plumbers R Us can be in one of several possible states. When the customer first phones the plumber with a request, the job is recorded. The job is then scheduled, subsequently completed, and finally invoiced and paid for. Sometimes a job is canceled without being completed, in which case it is not invoiced.

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