Определите в них видо-временные формы глаголов и укажите их инфинитив.
1. In mixed economy both the state and the private sector play an important role.
2. He wrote this book in response to the Great Depression of the 1930s.
3. Keynes was a British economist.
4. Keynes's work aroused Frank P. Ramsey to outline his own "subjective" theory of probability.
5. Keynesian economics is the opposite of laissez-faire economics.