The accompanying data file contains three variables, x₁, x₂, and x₃.

The variable x₁ contains three categories: S, M, and L. Convert the category names into category scores (i.e. S = 1, M = 2, and L = 3). How many observations have a category score of 3?

Note: Round your answer to two decimal places.

The variable x₂ contains two categories: Yes and No. Transform x₂ into an appropriate number of dummy variables, using "No"as the reference category. How many dummy variable (s) should be created?

The variable x₃ contains four categories: A, B, C, and D. Reduce the number of categories by combining the two least frequent categories into a new category E. How many observations are in the E category?

x1	x2	x3
S	Yes	C
M	Yes	B
S	Yes	B
M	Yes	D
M	Yes	D
L	No	A
S	Yes	C
S	No	D
S	Yes	C
L	No	B
M	No	B
S	No	D
S	Yes	A
M	No	D
L	Yes	A
L	No	B
L	Yes	D
M	No	D
L	Yes	C
L	Yes	A
M	Yes	D
S	No	A
S	Yes	C
L	Yes	C
L	No	A
M	Yes	A
S	Yes	C
M	Yes	A
S	No	A
S	Yes	C
M	Yes	C
M	Yes	A
M	Yes	A
L	Yes	A
M	Yes	B
L	No	D
L	No	B
S	Yes	D
L	No	A
S	Yes	A
S	Yes	C
S	Yes	A
S	Yes	A
M	Yes	A
M	No	D
L	Yes	C
L	Yes	C
M	No	C
S	Yes	D
S	Yes	A
M	Yes	D
S	No	C
S	Yes	A
M	No	C
M	No	A
S	No	A
S	Yes	A
S	No	A
M	Yes	C
L	Yes	B
M	Yes	A
S	No	B
M	Yes	A
M	No	C
M	No	C
S	Yes	A