Daily temperature $($in Celsius$)$ in Beijing, China. $(1)$ What type of chart$/$plot is it$?$ In what situation$($s$)$ would such chart$/$plot be the most appropriate$/$useful$?$

$(2)$ What can you see$/$learn from the chart$/$plot$?$ Please make sure you state an observation even when it is obvious.

$(3)$ What business decision$($s$)$ may be sensible based on the chart$/$plot$?$ Why? If you do not believe the chart$/$plot implies any actions, explain the reason$($s$).$

$(4)$ How would you have improved the visualization $($to make it more clear or more informative$)?$