It is known that the probability that a certain employee of the company lives less than 2 km from the building where the offices are located is 60%. a) If a group of 10 workers is randomly selected, what is the probability that exactly 2 live within 2km of the building where the offices are located? b) In this same group of 10 randomly selected workers, what is the probability that less than 10 workers live within 2km of the building where the offices are located? c) If we now randomly take a group of 100 workers, what will be the probability that less than 70 of them live exactly less than 2 km from the building where the offices are located?