Answer: 44, 55, 66, 77
Explanation:
To find the lower boundaries for each distribution of waiting times, we need to determine the lower limit of each interval.
Given the upper boundaries for the waiting times as 45, 56, 67, and 78, we can calculate the lower boundaries by subtracting 1 from each upper boundary.
Lower boundary 1: 45 - 1 = 44
Lower boundary 2: 56 - 1 = 55
Lower boundary 3: 67 - 1 = 66
Lower boundary 4: 78 - 1 = 77
Therefore, the lower boundaries for each waiting time distribution are 44, 55, 66, and 77 seconds.
I hope this helps :)