The roadrunner bird can run 14 miles per hour. that's 7 times faster than an ostrich can walk. how fast does an ostrich walk?

In 2014, the three largest economies in the world were (listed in order, from largest): a) the u.s., china, germany. b) the u.s., china, japan. c) china, the u.s., japan. d) china, the u.s., germany.