There are three contractors to do tasks and their performances (how fast they can finish) were recorded as following. a) If each contractor works for the task, what is the probability that each contractor takes 8 or more days? b) Which contractor has the lowest probability that takes 8 or more days? Subject Statistics and Probability Sub-subject Search And Select C 1 day or less 2-3 days 3-4 days 5-6 days 7 or more days Total Contractor 16390735955340 Contractor 295496557221 Contractor 3115706587265 Total 18721423412269826