The Hoffmann elimination is a reaction that allows an alkene to be obtained from an amine. Mechanistically, it is a three-step reaction. In the first stage, the compound undergoes exhaustive methylation with methyl iodide in order to transform the amino group into a good leaving group. Then, in a subsequent step, the compound is treated with acouso-silver oxide, which allows the introduction of a base (necessary for elimination E2). Finally, by heating the reaction mixture, the alkene is formed.
I fully understand the mechanism and each of its stages. However, I do not know how to predict the product of a Hoffmann elimination. For example, I need to know what products are obtained after subjecting species (A) to a Hoffmann elimination: