March 26th is also Good Hair Day. To celebrate this one, you decide to stop into Great Clips to get a haircut. The time between arrivals for customers at Great Clips follows an exponential distribution with a mean time of 30 seconds. What is the probability that the arrival time interval between 2 specific customers is less than 30 seconds? What is the probability that the arrival time interval between 2 specific customers is between 20 and 40 seconds