During the "National Day" Golden Week, the number of tourists traveling to Lushan Scenic Area every day during the seven-day holiday changes in the following table (positive numbers indicate more peop

During the "National Day" Golden Week, the number of tourists traveling to Lushan Scenic Area every day during the seven-day holiday changes in the following table (positive numbers indicate more people than the previous day, negative numbers

The number of people on day 1 is: 4.5+1.6=61,000; the number of people on day 2 is: 6.1+0.8=69,000;

The number of people on day 3 is: 6.9+ 0.4=73,000 people; the number of people on the 4th is: 7.3-0.4=69,000 people;

The number of people on the 5th day is: 6.9-0.8=61,000 people; the number of people on the 6th day is: 6.1+0.2 =63,000 people;

The number of people on the 7th is: 6.3-1.2=51,000 people.

The largest number of tourists in seven days was on the 3rd day; the lowest number was on the 7th day; the difference is: 7.3-5.1=22,000 people.

So the answer is: 3, 7, 2.2.