require 'bundler/setup' require 'gviz' g = {1=>[3], 2=>[4], 3=>[4, 5], 4=>[6], 5=>[6], 6=>[7, 11], 7=>[8], 8=>[13], 9=>[10], 10=>[11], 11=>[12], 12=>[13], 13=>[14]} gv = Gviz.new gv.graph do global rankdir: 'LR' g.each {|k, v| route k => v…