In a sample of [5131 British civil servants who worked more than 40 hours a week. TSU said that they usually get less than '3' hours of sleep per night. In another sample of 958 British civil servants who worked between 35 and 49 hours per week, 40? said they usually get less than 'r' hours of sleep per night. The investigators believed that the samples were representative of the populations to which they belong. Find a 99% condence interval for print: where #1 is the proportion of British civil servants who worked more than 40 hours per week and got less than T hours of sleep per night and p: is the proportion of British civil servants who worked between 35 and 4D hours per week and get less than T hours of sleep per night