Treating either 1-chloro-3-methyl-2-butene or 3-chloro-3-methyl-1-butene with Ag2O in water gives (in addition to AgCl) the following mixture

Question:

Treating either 1-chloro-3-methyl-2-butene or 3-chloro-3-methyl-1-butene with Ag2O in water gives (in addition to AgCl) the following mixture of alcohol products.

(a) Write a mechanism that accounts for the formation of these products.
(b) What might explain the relative proportions of the two alkenes that are formed?