For the following SQL Database questions choose the correct response: ------------------------------------------------------------------ Question a. : The relational model consists of i. relation schemas ii. relational operators or relational operations iii. constraints iv. all of the above. ------------------------------------------------------------------ Question b : In relational model, the sequence of the rows in a relation is significant. i. True ii. False ------------------------------------------------------------------ Question c : In relational model, the sequence of the columns in a relation is significant. i. True ii. False