communication diagram

communication diagram

Subject: Communications    / General Communications
Question
In a communication diagram, a teacher object and course object are connected with a line. Above the line it states “CourseAttendance()” and it points to the course object from the teacher object. Another message on the line is “UpdateCreditHrsTaught()” and it points from the course object to the teacher object. Explain what this information means. Include in your answer which object is sending the messages to which object and which objects contain the methods.