<prompt> A test for hepatitis C is performed for 200 patients with biopsyproven disease and 200 patients known to be free of the disease. The test shows positive results on 180 of the patients with the disease, and negative results on 150 of the patients without the disease. Among those tested, this test thereforeHas a positive predictive value of 90Has a sensitivity of 90Has a negative predictive value of 75Has a specificity of 82.5  <response>: It is given in the question, a c cases 200; b d healthy 200And also, test shows positive results on 180 of the patients with the disease 200, so a TP 180 and c FN 20; and negative results on 150 of the patients without the disease, so d TN 150 and b FP 50 