What is the oxidation number of nitrogen in $N_3H$?

The oxidation numbers of sulphur in $S_8$,$S_2F_2$,and $H_2S$ respectively,are:

What is the oxidation number of $Mn$ in $MnO_{4}^{2-}$ ion?

The oxidation state of chlorine in perchloric acid $(HClO_4)$ is:

Find the oxidation number of $Cl$ in $ClO_4^-$

Fill in the blanks:
$(1)$ Oxidation number of $Cr$ in $Na_3Cr_3O_{10}$ is ........
$(2)$ Oxidation number of $H$ in lithium aluminum hydride $(LiAlH_4)$ is .......
$(3)$ Oxidation number of oxygen in potassium ozonide $(KO_3)$ is .........
$(4)$ Oxidation number of $C$ in fullerene and graphite is .......