A 49-year-old patient sees the physician for fatigue and lack of energy. The patient thinks that their skin has become slightly yellowish, and their fingers are often feeling numb or tingly.
The CBC is as follows:
| Parameter | Result |
| Hemoglobin | 6.3 g/dL |
| Hematocrit | 22% |
| WBC | 4 x 109/L |
| MCV | 128.6 fL |
| MCH | 36 pg |
| MCHC | 28 g/dL |
Based on this case, please answer the following questions.
