Consider the star topology network: H1 - H3 - H4 | H2 where Hosts CPU speeds and receiving bandwidths are considered infinite, each link is 3km and reliable propagation speed is 3*10^8 m/s. Given the transmitting bandwidth of 3Mbps between H1-H3 and H2-H3. a) If H1 and H2 simultaneously start transmitting 25 frames each to node H3, how long it would take for node H3 to receive all frames. b) Consider that at time 0 node H1 starts sending three 100KB frames per second (fps) to H4 and node H2 starts sending four 100KB frames per second (fps) to H4. Calculate the required transmit bandwidth for H3 towards H4, for a constant queue length at H3