function merge_sort(list m) // if list size is 0 (empty) or 1, consider it sorted and return it // (using less than or equal prevents infinite recursion for a zero-length m) if length(m) <= 1 return m // else list size is > 1, so split the list into two sublists var list left, right var integer middle = length(m) / 2 for each x in m before middle add x to left for each x in m after or equal middle add x to right // recursively call merge_sort() to further split each sublist until sublist size is 1 left = merge_sort(left) right = merge_sort(right) // merge the sublists returned from calls to merge_sort() and return the resulting merged sublist return merge(left, right) function merge(left, right) // set up a 'result' variable for the merged result of two sublists. var list result // assign the element of the sublists to 'result' variable until there is no element to merge. while length(left) > 0 or length(right) > 0 if length(left) > 0 and length(right) > 0 // compare the first two element, which is the small one of each two sublists. if first(left) <= first(right) // the small element is copied to 'result' variable. // delete the copied one (a first element) in the sublist. append first(left) to result left = rest(left) else // same operation as the above (in the right sublist). append first(right) to result right = rest(right) else if length(left) > 0 // copy all remaining elements from the sublist to 'result' variable, // when there is no more element to compare with. append first(left) to result left = rest(left) else if length(right) > 0 // same operation as the above (in the right sublist). append first(right) to result right = rest(right) end while // return the result of the merged sublists (or completed one, finally). return result Draw the corresponding graph and label the nodes as n1, n2, and edges as e1, e2