Which of the following are the primary skills required by an administrative worker?

Group of choices are not provided, hence the question is incomplete, however, answer is provided on the basis of general idea:

Medical administrative worker or assistants are accountable for number of tasks to maintain the  the office they are managing works properly. These tasks may differ on the base role and location

Administrative medical workers manages the clerical work in medical offices or clinics. Taking calls, managing appointments, patient records and files managing, understanding of basic medical terminology, and communication skills are some role and primary skills of a administrative worker.

which coordinates are the best estimate of the solution to the system of equations?