<image> The image shows the number of tourists in the third and fourth weeks of the golden tourism month in a certain area. Analyze the chart and fill in the blanks.
(1) The total number of tourists in week ____ is larger.
(2) The day with the most tourists is week ____ , day ____.
(3) Compared to the previous day, the number of tourists increased the most on week ____ , day ____.
(4) The overall trend in tourist flow during the week is ____.