The famous American economist Arthur Okun discovered the empirical relationship between economic growth and unemployment in cyclical fluctuations, that is, when real GDP growth relative to potential GDP growth (usually defined as 3%) 2 The unemployment rate rises by about 1% at the rate of 1%; this rule of thumb is named after its discoverer, known as Okun ’s law. The concept of potential GDP was first proposed by Okun, and it refers to keeping prices relatively stable. The largest output value produced by the country's economy. Potential GDP is also called full-employment GDP. Which of the following analysis methods are the same as above:. ['the legs of the frog have a strong pedaling force on the water surface, and the reaction force of the water to the frog is also very large. People are inspired by it, imitating the frog invented the swimming method of the breaststroke.', 'the speed of the gear is inversely proportional to the number of teeth, that is, the more the number of teeth of the gear, the slower the speed of the gear.', "the bat can fly fast at night and can avoid obstacles, because its ears can hear the echo generated by the ultrasound when it encounters the obstacle. If the bat's ear is blocked, it will hit the obstacle; if Blind the bat's eyes without hitting the obstacle.", 'there is a broom cloud in the sky, no rain for three days.']