Urine tests are commonly used to test for drugs. The null hypothesis would say there were no illegal drugs used. Pick the most appropriate cutoff level for the P-value, 0.10 or 0.05 or 0.01, under each of the following circumstances.
a. No other information is provided.
b. If illegal drugs are detected, an athlete is immediately barred from participation in his sport.
c. If illegal drugs are detected, a more accurate follow-up test is carried out.