A man in a red shirt is standing next to a woman in a blue dress. They are both holding hands and smiling at each other. The Treaty of Westphalia established the modern system of international relations. The Treaty of Westphalia was signed in 1648. If the Treaty of Westphalia was signed in 1648, then was the modern system of international relations established before 1648? If a company's stock price increases by 10% and then decreases by 5%, what is the net change in the stock price?
yes
no
yes