Imagine that you have trained your st. bernard, bernie, to carry a box of three 8mm tapes instead of a flask of brandy. (when your disk fills up, you consider that an emergency.) these tapes each contain 7 gigabytes. the dog can travel to your side, wherever you may be, at 18 km/hour. for what range of distances does bernie have a higher data rate than a transmission line whose data rate (excluding overhead) is 150 mbps?