The following contingency table summarizes the drug test results for 433 test-takers: Positive Negative Total Doesn't use drugs 4 186 Uses drugs 231 12 Total For a randomly selected test administration, find the following probabilities. (Round the answers to 4 decimal places.) 1) The probability that the test-taker doesn't use drugs: 2) The probability of a true negative: 3) The probability of an error