12. Solving a chemistry problem

1a) Expose 1,1-dichloropentane to the action of an excess of an alcoholic solution of alkali. The resulting compound is treated with metallic sodium and then with 2-iodopropane. To act on the final product of the reaction with water in the presence of mercury (Kucherov´s reaction). Write the equations of the ongoing reactions and name the resulting substances.
b) Write the reaction equation for the polymerization of 2-methyl-1,3-butadiene.