Crit % creatures and damage % vs weak element

2 quick questions :

  1. How can I check crit % of creatures or do all creatures have same flat crit % and only improves by artifacts, buffs etc ? If so what is this flat %.

  2. What is the bonus damage % you do with a creature vs a creature that has a weak element vs yours ?

Best game I played in a long time mechanics wise and thanks in advance