(5) 2. Suppose that a certain system contains a key component #1 which has an identical backup component # 2 in an \"off " state until needed. #2 l\" 0 *l_ #1 The length of life of a component X ,3, i = 1, 2, measured in thousands of hours, has a uniform distribution on the interval [1, 3]. a) Find the edf and the pdf of a lifetime X of a system. b) Find EX and determine the probability that the system will not fail before 2400 hour-s. Hint: consider the joint pdf of X1 and X2