When you add subtotals, Excel defines groups and these groupings form a(n) ________ of your worksheet that displays along the left side of the worksheet

Which of the following types of graphs is useful for visualizing hierarchical data along multiple dimensions?

a. heat map b. treemap c. trendline d. parallel coordinates plot

____ is high-speed memory that a processor can access more rapidly than memory elsewhere on the motherboard.

A. Buffer B. Cache C. RAM D. ROM