Task$-3$: True or False

$2$ point$/$question

The join operation works by first computing the cartesian product of two relations and then applying

the given condition on the product.

Relations $($sets$)$ have an order and can have duplicates.

Select, Project, and Intersection are unary operators $($requires one relation$)$

To compute the union or intersection between two relations the number of attributes

should be the same, but the corresponding columns don't need to be compatible $($can have

different types$)$

Candidate keys can not have NULL attributes.