6. Draw the resonance forms for nitrogen dioxide monobromide, NO₂Br (N is central, the other atoms are bonded to it). (a) How many sigma bonds are there? How many pi bonds? (b) What is the nitrogen-oxygen bond order? (c) Arrange the following species in order of decreasing N-O bond strength (strongest first, weakest last): NO2, NO₂Br, NO, H₂NOH