12. Solving a chemistry problem

33a) Write the reaction of the interaction of 3-chloro-2-methylpentane with an aqueous solution of alkali and name the resulting organic substance. How does it react:
1) with metallic sodium;
2) with phosphorus pentachloride;
3) with red-hot copper oxide?
Name the substances obtained in paragraphs 2 and 3.
b) Treat 2-methyl-4,4-dichloropentane with an excess of aqueous alkali solution. Name the resulting connection enter into interaction:
1) with sodium hydrosulfite;
2) with hydrogen;
3) with a strong oxidizing agent.
Name the substances obtained in paragraphs 2 and 3.