The propagation delay is the time that is required for the energy of a signal to propagate from one point to another. a. Find the propagation delay for a signal traversing the following networks at the speed of light in cable (2.3 x 10 8 meters/second): • a circuit board 10 cm • a room 10 m • a building 100 m • a metropolitan area 100 km • a continent 5000 km • up and down to a geostationary satellite 2 x 36000 km b. How many bits are in transit during the propagation delay in the above cases, if bits are entering the above networks at the following transmission speeds: 10,000 bits/second; 1 megabit/second; 100 megabits/second; 10 gigabits/second.