Why does the stem consist of two digits? O It cannot consist of more than two digits. O It is the most compact way to represent this data as a stem-and-leaf display. O It must contain only thousands. O It does not matter how many digits the stem consists of. What is the first step to build a stem-and-leaf display? O Indicate the units for stems and leaves someplace in the display. O Select one or more leading digits for the stem values. O List possible stem values in a vertical column. O Record the leaf for every observation beside the corresponding stem value