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OffYear EnrGrade 2003 2003 StdSSN StdCit StdClassOfferNo OffTermO SEATTLE I JUN SEATTLE BOTHELL JUN BOTHELL JUN BALTIMORESEN FALL FALL WINTER 2003 FALL SPRING I 2004 CourseNoCrsdesc C1 C2 C3 C2 C2 S1 3.5 DB VB JUN 02 S2 S2 2003 02 04 VB VB 3.4 S3 StdSSN: Students SSN StdCity: Students address StdClass: {freshman, sophomore, junior, senior) OfferNo: a unique number for each class OffTerm: term in a year (semester) OffYear: year EnrGrade: Grade CourseNo: Course number Crsdesc: Course description [2.1] Please find out all the candidate keys and then choose the primary key. (The primary key could be a composite key) [2.2] Please find all the functional dependencies fdl: fd2 fd3 fd4: [2.3] Please find out the second normal form (in the format of relational schema) [2.4] Please find out the third normal form.

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