Section 1: Recent concerns about the roadworthiness of trucks operated by a large national freight company have been somewhat justified by the discovery that 55% of trucks operated by the company have sufficient defects for them to be considered un-roadworthy. If a convoy of five trucks belonging to the company is stopped by police determine, in Q1 - 3, the probability that: Q1. All five trucks are un-roadworthy. Q2. None of the five trucks are un-roadworthy. Q3. Between three and four trucks (inclusive) are un-roadworthy. Q4. Determine the variance of the variable of interest that is the focus of the probability determinations in Q1 -3. Provide a brief explanation of the information this numerical summary provides about the variable in this particular context