Homework 3. Using Unix.

5. Write a command to find every class whose course-number starts with 33. (A CRN can appear at any point in a line; you only want the lines that are headings for entries, like "CSC 1234: Computering".) 6. Write a command to find every class whose course-number is even. (Hint: the course-number is even if the last digit is even.) 7. Write a command to find every 4000-level class. (Again, you only want the lines that are headings for an entry.) 8. Write a command to remove all the course-title lines. 5. Write a command to find every class whose course-number starts with 33. (A CRN can appear at any point in a line; you only want the lines that are headings for entries, like "CSC 1234: Computering".) 6. Write a command to find every class whose course-number is even. (Hint: the course-number is even if the last digit is even.) 7. Write a command to find every 4000-level class. (Again, you only want the lines that are headings for an entry.) 8. Write a command to remove all the course-title lines