same outcome for different Criteria in rubric

[SamSlim]

Hello 

I'm looking for a way where I can assign a rubric to quiz that include same outcome but for different criteria.

example in quiz I want to add "criteria1" is out of 4 and "criteria2" is out of 7 and I want their average to be assigned to an "outcome1" and be calculated automatically out of 5 

Criteria1: 1/4    \

                            Criteria1+Criteria2 = 7/11  → Outcome1 = 3.18/5

criteria2: 6/7   /

please help me with this.