Tableau practice: Meet Tableau and the data

Tableau sorts every field into a dimension (something you slice by) or a measure (something you add up or average). Which of these is a measure?

A view has Region on Rows and SUM(Sales) on Columns. The practice data has 189 order lines across 4 regions. How many marks does the view draw?

Build a view that shows the total Sales of each Region. Put Region on Rows and SUM(Sales) on Columns.

In Tableau, what is the visual difference between a discrete (blue) pill and a continuous (green) pill on a shelf?

Build a continuous timeline showing Sales over Order Date. Put continuous Order Date (Year and Month) on Rows and SUM(Sales) on Columns.