Questions regarding Learning pre requisites

Hi all,

I have the following questions around Learning Pre requisities:

1. How can we ensure Learner has achieved the Pre requisities to enroll in a course?
2. Since Prerequisities comes from prerequisite profile type, which is a part of talent profile, are employees able to edit the skills/qualification as per how they want to add the necessary pre requisite? How do we ensure this (Learning pre requisite) is only achievable through completion of a particular course?
3. How can learner search/filter courses according to Learning pre requisites?

Really would appreciate any responses.

Thanks

Nidhi