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15. In population X (n = 10,000), 2,000 individuals have a disease and 8,000 individuals are disease-free. A screening test has been developed for this disease, which has a sensitivity of 90% and specificity of 80%. a. Please complete the following 2x2 table for Screening Test 1. (6 points) Screening Test 1 True Disease Status Positive Negative Total Test Result Positive Negative Total b. Calculate the accuracy of screening test 2. (4 points)