When you go to the page, does it show if it's in a workflow, if so, what is the name? Otherwise, you should see a button at the top saying sign workflow.
What do you need to do with those 4 roles? Add them in the workflow for approval? Or you want to assign them special permissions? If you need to add them for approval, you can follow the instruction online, go to the step, and add the roles to each step. If you want to just manage permission, then it's under the Page > Properties > Security.