Ex 3 and 4 is one two part question. This was given as an example question. The professor showed no work. I don't know how to approach this question. Please explain.

Ex. 3 A study on drug Zyban was conducted with participants who smoked 15 or more cigarettes a day, in which quitting smoking was defied as being able to stop smoking for four consecutive weeks. In the study consisting of 446 participants, Zyban was effective in 109 of 223 participants, while 80 of 223 quit smoking by using a nicotine patch. Using a 1% level of significance, is there sufficient evidence to suggest that Zyban is more effective than nicotine patch in helping smokers quit smoking? Ex. 4 Use the data in ex. 3 to construct a 99% confidence interval for the difference between the population proportions of pz of Zyban users who quit smoking, and the population proportion of py of nicotine patch users who quit smoking. Ex. 5 In the discrimination case Connecticut v. Teal, the following data were given concer g a CT state agency's record of employees rejected or selected for promotion. Selected Rejected