A journal published a study demonstrating the "last name -- i.e., the tendency for consumers with last names that begin with a later letter of the alphabet to purchase an item before consumers with last names that begin with earlier letters. To facilitate the analysis, the researchers assigned a number, x, to each consumer based on the first letter of the consumer's last name. For example, last names beginning with "A" were assigned x=1, last names beginning with "B" were assigned x=2, and last names beginning with "Z" were assigned x=26. Find E(x) using the probability distribution. If possible, give a practical interpretation of this value