3. a) Find simple connected graphs with the following vertex degrees if possible. If such graphs are not possible explain why. 2 2 2 2 3 3 3 3 4 4 4 1 2 3 3 4 b) Find simple connected graphs with the following vertex degrees if possible. If such graphs are not possible explain why. 2 2 3 3 4 1 2 2 3 4 2 2 3 4 5