Requirements

1. When exam.html is opened in the browser, the content of variable TABLE_DATA in json/data.js will appear as a table on the browser. Table column order should adhere to the order already written in exam.html.
2. When button#start is clicked, table rows will randomly rearrange every second.
3. The processing in 2 can be stopped when button#stop is clicked.
4. When button#sort is clicked, rows will be sorted by price in descending order. If two or more prices are the same, rows will be sorted in ascending id order.