Please answer the question with steps

1a

1b

a Refer to the previous ER case. A study has determined that 75% of the patients in ER simply require routine treatment. A new process separates the ER into two treatment areas, one for routine care and another for emergency cases. A nurse will do the initial screening and assign the patient to one of the two tracks after registration. Patients for routine care are seen by a doctor to affirm the nurse has made a right decision. In case of a nurse's mistake, the patient is moved to the emergency track. Patients for emergency care are seen by a doctor who either (a) admits them for further treatment or (b) determines that they really are routine cases, prescribes medication and releases them. After the new process has been implemented, it is determined that there are, on average, 20 people waiting to be registered, 5 waiting to be seen by the nurse, 10 waiting to be seen by a doctor in the emergency area, and 10 waiting to be seen by a doctor in the routine care area. One average, 75% of the patients are classified by the nurse as needing routine care. Routine track Doctor Admit ER Patient arrives Register Nurse Doctor Routine Emergency track On average, how long do patients who are finally not admitted to the hospital (i.e., the routine case) spend in the emergency room after the introduction of the new process? Assume that the nurse makes no mistake in identifying a patient as needing routine or emergency care. 1.67 hours 2.46 hours 3.25 hours 1.25 hours 1.92 hours On average, how long do patients who are finally admitted to the hospital spend in the emergency room (i.e., the emergency case) after the introduction of the new process? Assume that the nurse makes no mistake in identifying a patient as needing routine or emergency care. 3.25 hours 1.67 hours 2.46 hours 1.25 hours 1.92 hours