The order can be in a few different ways like 213, 321, 132, 312. You get the idea
Answer:

Step-by-step explanation:
As you're used to do in the real plane, midpoint is the average of Real and Imaginary part. So 
Answer: 1/5
Step-by-step explanation:
(1--1)/(4--6) = 2/10 = 1/5
I can’t see the whole thing take a picture of it again or explain the problem to me