Compounds x, c9h19br, and y, c9h19cl, undergo base-promoted e2 elimination to give the same single alkene product, z. catalytic hydrogenation of z affords 2,3,3-trimethylhexane. in water x readily reacts to give a substitution product, c9h19oh, together with z. y does not react with water. propose structures for x and y. do not use stereobonds in your answer. in cases where there is more than one possible structure for each molecule, just give one for each. draw one structure per sketcher. add additional sketchers using the drop-down menu in the bottom right corner. separate structures with + signs from the drop-down menu.