Q. A 32-year-old male is admitted to the hospital with a history of recurrent respiratory infections. He reports having frequent episodes of bronchitis and pneumonia over the past year, which required several courses of antibiotics. Additionally, he has also experienced recurrent episodes of diarrhea and abdominal pain. On physical examination, the patient is found to have a low-grade fever of 100.5 degrees Farenheit and a mild cough. Laboratory investigations reveal leukocytosis with neutrophilia, and his chest X-ray shows patchy infiltrates in the left lower lobe of the lung. A sputum culture is obtained, and he is started on broad-spectrum antibiotics. He is managed with aggressive antibiotic therapy, and his symptoms gradually improve. You are concerned the patient may have low levels of mannan-binding lectin, a key component of the innate immune system (the lectin pathway). Which of the following results do you expect on this patient’s total complement activity (CH50) and alternative complement pathway (AH50) activation?