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A study found that the mean amount of time cars spent in drive-throughs of a certain fast-food restaurant was 149.6 seconds. Assuming drive-through times are normally distributed with a standard deviation of 24 seconds, complete parts (a) through (d) below. The probability that a randomly selected car will get through the restaurant's drive-through in less than 121 seconds is. (Round to four decimal places as needed.) (b) What is the probability that a randomly selected car will spend more than 185 seconds in the restaurant's drive-through? The probability that a randomly selected car will spend more than 185 seconds in the restaurant's drive-through is. (Round to four decimal places as needed.) (c) What proportion of cars spend between 2 and 3 minutes in the restaurant's drive-through? The proportion of cars that spend between 2 and 3 minutes in the restaurant's drive-through is. (Round to four decimal places as needed.) (d) Would it be unusual for a car to spend more than 3 minutes in the restaurant's drive-through? Why? The probability that a car spends more than 3 minutes in the restaurant's drive-through is , so it be unusual, since the probability is than 0.05. Enter your answer in each of the answer boxes.