Intensive care units [ICUsj generally treat the sickest patients in a hospital. ICUs are often the most expensive department in a hospital because of the specialized equipment and extensive training required to be an ICU doctor or nurse. Therefore, it is important to use ICUs as efcientlyr as possible in a hospital. According to a 21017 largescale study of elderly ICU patients, the average length of stay in the ICU is 3.4 days {Critics-i Care Medicine journal article]. Assume that this length of stay in the ICU has an exponential distribution. Do not round intermediate calculations. a. What is the probability that the length of stay in the ICU is one dayr or less [to 4 decimals)? I}. What is the probability that the length of stay in the ICU is between two and three days {to 4 decimals}? c. What is the probability that the length of stay in the ICU is more than five days [to 4 decimals}?I II'D