complex number addition

Topic:
Addition
Use the graph below to visualize the answers to the three problems beneath it. The vertical axis is imaginary numbers and the horizontal axis is real numbers.

What is (6 + 5i) + (-2 - 3i)?

What is (8 - 2i) - (4 + 7i)?

What is (5 + 6i) + (-4 + 3i)?