What is the hybridization of all the atoms (other than hydrogen) in each of the following species?

Question

What is the hybridization of all the atoms (other than hydrogen) in each of the following species?  
a) NH3      e) +NH4            i) H3O+
b) BH3      f) +CH3             j)H2C=O
c) -CH3     g) HCN
d)*CH3      h) C(CH3)4

There are a couple I don't know how to do. Please help? Did I do the other correctly? 
Thanks. 
a) tetrahedral/sp3   e) ?              i) tetrahedral/sp3
b) tetrahedral/sp3   f) ?               j) ?
c) tetrahedral/sp3   g) linear/sp
d) tetrahedral/sp3   h) ?

Any help is great appreciated.

DrBob222 · Answer

a is right.
I believe b is sp2, trigonal planar. B has only 3 bonding electrons so can't be sp3.
I don't know what c,d,f mean
e is sp3
g is right
I believe all of these are sp3 bonds but you should confirm that.
i is sp3
j is sp2

Michelle · Answer

Thank you Dr.Bob. For some reason my textbook doesn't have any answers to the selected problems so I don't know if I on the right track. I really appreciate your help.