Find
a. any two different points whose sum is

b. any two different points in three dimensions whose sum is
000

c. any two different complex numbers and their sum will create the degenerate parallelogram.
d. any two different points in three dimensions and their sum lie on the same line
e. a point that is mapped to 1
−3
after multiplying −2
f. a point that is mapped to
12
−2
4
after multiplying −23