how to write formula dot structure and normal structures of alkanes,alkenes and alkynes with video link by AIIMIIT

1.write general formulas of alkanes .alkenes,and alkynes
2.write formulas of first 10 compounds of alkanes ,alkenes, and alkynes
3.write normal structures of first 10 compounds of alkanes,alkenes and alkynes
4.write dot structures of alkanes,alkenes and alkynes
5.why methene and methyne are not possible
6.why alknaes are called satyrated and alkenes and alkynes are called unsaturated hydrocarbons