Describe the following sets in terms of graphs, supergraphs, and subgraphs of functions appropriate: A = {(x, y, z) | y2 + x < yz ≤ x + y2 + z2}B = {(x, y, z,w) | x + w2 < y + z3 ≤ x + z2 + w3)}C = {(x, y) | | y2 − y |≤ x, | y + 2 |≤ 1} Please give the answers step by step as explicitly as possible. thank you