a)Calculate the power of the signal in watt per square meter in the surface of the Earth for a GPS transmitter that is 24000 km above the surface of the earth and transmitting at 54 W

b)

If eight users are connected to a wireless network that offers a maximum data rate of 4 Gbit /s and throughput of 35%. what is the typical average practical message data rate available for each user? express the answer in Mbit/s