Below is the structure of Ace-Ala-Nme. I have labelled just four of the carbon atoms (1-4 in blue). I need to identify (i) the hybridization state, and (ii) the number of electron withdrawing groups for each.

![enter image description here][1]

I understand that nitrogen is highly electronegative and I read somewhere that double bonds tend to be electron withdrawing so my attempt is as follows:

    1: sp3 with 1 electron withdrawing group
    2: sp3 with 2 electron withdrawing groups
    3: sp3 with 0 electron withdrawing groups
    4: sp3 with 1 electron withdrawing group

Can anyone confirm that this is correct? I feel apprehensive about applying vague rules-of-thumb.


  [1]: https://i.sstatic.net/INRpT.png