Write paraphrases of the quotations. Do not forget to cite the sources. Many different paraphrases are possible.

1			"Robots can make more cash than people when they trade. The difference might be millions of dollars a year," explained a software engineer.
2			"I never thought the robots would perform so well. I plan to use one to help me evaluate my stock portfolio," says a well-known researcher.
3			"A robot couldn't compete against a very experienced trader," the newspaper columnist says.
4			"We don't think that robots will replace humans in commodities trading, but perhaps they will assume some of the repetitive, technical work," says the head of product development.