Metrics Idea: How many KSATs are shared between work roles? (display change)

Scenario: I want to know many KSATs are shared between work roles.

Given a KSAT item,

When I want to see if it is shared/overlapping between work roles

Then display how many/which work roles.

ex)

xxx number of KSATs are shared between Basic Dev and Senior Windows.

xx% of KSATs are shared between (overall KSATs)

KSAT xxxx is shared by PO, Basic Dev and Senior Windows.