You are a part of a bird watching club searching for robins in a nearby park. Club members tend to sit at the park and spot a total of 50 birds before leaving the park. The probability of viewing a robin is 0.4 in this particular park at any given day and this probability remains constant. We can assume that the probability of spotting a robin in this park is independent of whether another robin is seen at any given time. Let Z be the number of robins seen on any given day