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1)List the last name, first name, and phone number of students who do not have a phone number.Display ‘212-555-1212’ for the phone number. ] 2)For course numbers 20, 120, 122, and 132, display the description, course number, and prerequisite course number.If the prerequisite is course number 120, display 200; if the prerequisite is 130, display ‘N/A’.For courses with no prerequisites, display ‘None’.Otherwise, list the current prerequisite. 3)Determine the average cost for all courses.If the course cost contains a NULL value, substitute the value 0. 4)Write s SELECT (nested subqueries) statement that displays the first and last names of students who registered first.


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