of four neighbors, Sean, Maria, Sarah, and Brian, has a different occupation (editor, banker, chef, or dentist). From the following clues, determine the occupation of each neighbor.      A. Maria gets home from work after the banker but before the dentist.      B. Sarah, who is the last to get home from work, is not the editor.      C.The dentist and Sarah leave for work at the same time.

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Set Theory

Every field in the present world involves a set. The theory of sets was developed by German mathematician Georg Cantor while working on the “problems of trigonometric series”.