-Interface IResearchScholar has two methods: public void teaches (string str) and public void studies (String str). - Define classes JuniorRS and SeniorRS such that JuniorRS implements IResearchScholar and SeniorRS extends JuniorRS. -Class InterAbstrTest extends SeniorRS, and has the main method. An object of JuniorRS invokes the method studies, and an object of SeniorRS invokes methods studies and teaches.

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