Tough Problems: Negotiating pay when you’ve dug yourself in a hole; coming to graduation in an era of coronavirus

This is the latest in the Tough Problems series. In each installment, I present two composite questions that my clients face and my response to each.
One of today's questions is about a person who agreed to a lower salary than is fair. The other is a parent who doesn't want to go to the child's commencement ceremony for fear of coronavirus.