Question 6(10 points ) Check all that apply. We consider the constraint: A class start time must be before its end time. The constraint is w. Static Structural/syntactic Semantic Drnamic Check all that apply. We consider the constraint: in teaching assignment table that assigns professors to courses, each individual assiznment should correspond to exactly one professer and one course. The constraint is ... Semantic Dynamic Structural/syntactic static Question 8 (10 points) MySQL SQL and PostgreSQL permit to define the same reacthe and referential constraints. True False