5. Let ---{{3}(0) (0) - []} Ez contains all size 3 columns of Os and 1s. A string of symbols in 23 gives three rows of Os and 1s. Consider each row to be a binary number ordered from the least significant bits on the left to the most significant bits on the right (that is, reversed from the normal convention). Let B = {w 2| the bottom row of w is the sum of the top two rows }. For example, 0 0 EB, but & B. Show that B is regular