2. (7 pets) The following sraph represents WAN networks. Fach node is a packet switch. 3. ( 6 pnts) Line Encoding. For the bit stream 10110011 , sketch the waveforms for each of the codes listed. Assume the preceding signal level is at high level voltage. Manchester coding: O transition from high level to low level voltage i transition from low to high level voltage Differential Manchester coding: 0 transition at the beginning and a transition in the middle. 1 transition in the middle