find the word based on the definition

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Across
  1. 2. something assigned, as a particular task or duty
  2. 6. someone who is studying at university
  3. 8. social science concern about how individual or organization make decision under the scarcity of resources
  4. 9. something to be learned or studied
  5. 10. a place set apart to contain books where books can be read or borrowed
Down
  1. 1. a person who lectures
  2. 3. a bathroom
  3. 4. the head of certain universities
  4. 5. the purchase and sale of goods in an attempt to make a profit
  5. 7. one of the department of learning in a university