The Course class has four attributes, which correspond to the courselD, course name, course leader and duration. The courselD and coursename are each represented as a string of text and duration as a number. The courselD, coursename and duration are initialized in the constructor by being assigned the value of the constructor's parameters. The courseLeader is initialized with empty string (“") in the constructor. Each attribute has a corresponding accessor method. Define a method to set the courseLeader to a new name by accepting the new name of the course leader as a parameter. A display method should output (suitably annotated) the courselD, coursename, and duration and, if the courseLeader is not an empty string, the name of the Coursel eader also should be displaved.

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