Assume you've a population of 150 strings, 50 of which have zero length (corresponding to zero effort level), 50, short length (corresponding to low effort) level, and 50, long length (corresponding to high effort level). If you randomly picked two strings, determine the probability that both strings will be long? If you randomly picked fifteen strings, determine the probability that all fifteen strings will be long? If you randomly picked 150 strings, determine the probability that all 150 strings will be long?