data from www.centralhudsonlabs determined the mean number of insect fragments in 225-gram chocolate bars was 14.4 insect fragments per one 225-gram bar. three brands had insect contamination more than twice the average. assume that number of fragments follows a poisson process. a. if you consume a 225-gram bar from a brand at the mean contamination level, what is the probability of no insect contaminants?