Exercises 4.2.1 In a study by Cross et al. (A-2), patients who were involved in problem gambling treat- variable X represent the number of co-occurring addictive substances used by the subjects. Table...

resubmitted question with complete information. I only need help with 4.2.1 (b) and also 4.2.2 (a) and (b)

Extracted text: Exercises 4.2.1 In a study by Cross et al. (A-2), patients who were involved in problem gambling treat- variable X represent the number of co-occurring addictive substances used by the subjects. Table 4.2.4 summarizes the frequency distribution for this random variable. (a) Construct a table of the relative frequency and the cumulative frequency for this dis- ment were asked about co-occurring drug and alcohol addictions. Let the discrete random (b) Construct a graph of the probability distribution and a graph representing the cumu- ' crete distribution. lative probability distribution for these data. (a) What is probability that an individual selected at random used five addictive sub- (b) What is the probability that an individual selected at random used fewer than three 4.2.2 Refer to Exercise 4.2.1. stances? addictive substances? Table 4.2.4 Number of Co-Occurring Addictive Substances Used by Patients in Selected Gambling Treatment Programs Number of Substances Used Frequency 0. 144 342 don of 2. o e142 72 4 sdd owo.or fe 39 arrgracisrc bop 20 6. 6. 8. 6. 9. Total 1 777 3.