Consider the stem-and-leaf display given below. Stem Leaf
3 447
2 377
1 247
0 012

a. How many observations were in the original data set?
b. In the bottom row of the stem-and-leaf display, identify the stem, the leaves, and the numbers in the original data set represented by this stem and its leaves.
c. Re-create all the numbers in the data set and construct a dot plot.