Question: Please help with the question in the picture attached below: 10. A store has two phones. On each phone the waiting time until the first
Please help with the question in the picture attached below:

10. A store has two phones. On each phone the waiting time until the first call is exponen- tially distributed with mean one minute. Each phone is not influenced by the other. Let X be the shorter of the two waiting times, and Y be the longer. The joint pdf of X and Y is f(x, y) = 2e-(Ity) for 0
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