Graph , and  in the same [−4, 4, 1] by [0, 2, 1] viewing rectangle. If y1 represents f and...

Graph , and  in the same [−4, 4, 1] by [0, 2, 1] viewing rectangle. If y1 represents f and y2 represents g, use the graph of y3 to find the domain of f ∘ g. Then verify your observation algebraically.