please answer

3. The waiting time before catching a new fish follows an exponential distribution. You expect to catch a new fish after 17 minutes. (a) What is the parameter of the Exponential distribution? What is it equal to in this problem? (b) What is the probability you wait 5 to 15 minutes to catch a fish? (c) You started fishing 10 minutes ago but still haven't caught a fish. What the probability that you catch a fish more than 30 minutes after you started