Q. A 5-year-old male child is brought to the outpatient clinic because of a skin infection. The patient's medical history is significant for skin eczema diagnosed at the age of one month. Since then, the patient has been frequently diagnosed with recurrent staphylococcus aureus skin infection. Upon examination, obvious lichenification is noted over the face. Oral examination reveals multiple dentition abnormalities. The patient was admitted for further evaluation. Which of the following is expected in the patient's immunoglobulin profile?