A 35-year-old male presents with symptoms of palpitations, tremors, nervousness and headache. His father has a history of type 2 DM and mother has a history of some psychiatric illness. He has no chronic medical conditions and takes no medications. He appears anxious, sweaty and shaky. His fingerstick glucose is 45 mg/dl. The patient as administered a bolus of 50% glucose which rapidly improves his symptoms. CECT abdomen shows a mass as follows. Which of the following is likely to be seen after overnight fasting?