If the answer is wrong then the answer isn't right but it also isn't left hence making it wrong.
The formula of a midpoint of AB:

We have:
G(b; 0); F(3b; 2b)
substitute:

Answer: (2b, b)
Answer:
It will be 2. (B) and 4. (D)
Step-by-step explanation:
I took the assignment and got it right :D