A mother brings her 3-year-old child for a well-child checkup. The nurse notices pallor and asks the mother about her child's recent behavior. The mother reports that the child has been rather tired lately and quite irritable. Testing reveals that the child's hemoglobin is 7 grams/dL (70 g/L). Which additional laboratory result(s) should the nurse report to the healthcare provider? Select all that apply. Reference Range Hemoglobin [9.5 to 14 g/dL (95 to 140 g/L)]