If someone who really understand and can explain can me with this

1.)how many σ bonds and π bonds are in the molecule n2h2
2.)how many and what type of bonds are formed when a n atom combines with 3 h atoms to form nh3? which orbitals overlap to form these bonds?
3.)which of the following statements is true?
a. there are two π bonds in the lewis structure of ethene
b. the h–n–h angle in nh3 is slightly larger than the h–c–h angle in ch4.

c. the molecule (trans-dichloroethene lewis structure) possesses a dipole moment.
lewis structure of trans-dichloroethene
d. in co2, the carbon is sp2 hybridized.
e. none of the above statements is true.

4.)which orbitals overlap to form the bonds indicated in the molecule shown below (a and b)?
a b
a. sp3-sp2 sp2-sp2, p-p
b. sp2-sp2,p-p sp2-sp, p-p
c. sp2-sp2 sp3-sp3, p-p
d. sp2-sp2, p-p sp3-sp3
e. sp2-sp3, p-p sp2-sp

5.)which of these have delocalized π bonds?

so3
pf3
co2

i only
ii only
iii only
i and iii
none of these have delocalized π bonds