Question: It is true that: a . r ( Teaches ) = { < 2 9 9 0 8 1 0 , 2 5 8 >

It is true that:
a. r(Teaches)={<2990810,258>} b. dom(User.Name)= CHAR(6)
c. S ={Course, Lesson, User, Qualifications, Teaches} d. Qualifications (CID, Year)

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