Point A is located on a number line. If point A is between x and y, which are the values on the same number line, and if 0 < x < y, which of the following could represent the position of point A on the number line? Indicate all possible values.

a. x + 1

b. x − 1

c. y + 1

d. y − 1

e. x + y

f. x − y

g. y − x