At an urgent care facility, patients arrive at an average rate of one patient every eight minutes. Assume that the duration between arrivals is exponentially distributed. (Round your answers to four decimal places.) Part (a) Find the probability that the time between two successive visits to the urgent care facility is less than seven minutes. 0.3127 Incorrect: Your answer is incorrect. Part (b) Part (c) If 10 minutes have passed since the last arrival, what is the probability that the next person will arrive within the next four minutes? 0.5276 Incorrect: Your answer is incorrect. Part (d) Find the probability that more than six patients arrive during a half-hour period. 0.3937 Incorrect: Your answer is incorrect.