4. (25 points) Consider the following network: -Link 1- Transmission rate: 100 Mbps Link Length: 3 Kn Link 2 < Transmission rate: 1000 Mbp Link Length: 2 Km Transmission rate: 10 Mbps Link Length: 5000 Km You may assume a packet length of 8000 bits and ignore queueing and processing delays. Use a propagation speed of 3 108 m/sec in the following calculations. a. Calculate the transmission and propagation delays on Link 1. b. Calculate the transmission and propagation delays on Link 2. c. Calculate the transmission and propagation delays on Link 3. d. Assuming the processing and queueing delays are negligible (i.e., 0), calculate the end-to-end delay from the left host (when begin transmitting first bit of a packet) to the right host (when the last bit of that packet is received). e. For Link 1, determine the distance at which the transmission delay dtrans equals the propagation delay d prop.