Using the appropriate ggplot$2$ command$($s$),$ create a histogram chart for "Quantity." Ensure that bars are yellow with purple borders. Ensure that the chart has a title and axes labels.

Using the appropriate ggplot$2$ command$($s$),$ create a scatterplot for "Quantity and Sales." Ensure that "Quantity" is the x variable and "Sales" is the y variable. Mark the chart by color for each SaleType. Ensure that the chart has a centered title and axes labels.