Use the following results from a test for marijuana use, which is provided by a certain drug testing company. Among 150 subjects with positive test results, there are 20 false positive results. Among 152 negative results, there are 4 false negative results. Complete parts (a) through (c). (Hint: Construct a table.) (I) a. How many subjects were included in the study? The total number of subjects in the study was D. b. How many subjects did not use marijuana? A total of D subjects did not use marijuana. c. What is the probability that a randomly selected subject did not use marijuana? The probability that a randomly selected subject did not use marijuana is D. (Do not round until the nal answer. Then round to three decimal places as needed.)