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Imagine you are calling a friend in Asia. While you are talking, there is one signal connectingyou and your friend. However, it would be too expensive to directly wire every telephone inNorth America to every telephone in Asia. Laying one wired connection across the PacificOcean is expensive enough.Have a look at the animation at system.gif. Here we see a solution for wiring telephones in North America to telephones inAsia: have one wire between the continents, and connect telephones from the two continentsto either end of this one wire, as needed for conversations.(This technique is known astime-division multiplexing.)TODO (pre-lab): In the animation, five conversations are being connected.Draw what it would look like if six conversations were being connected.