Review the graph of function f(x). On a coordinate plane, a curve starts at open circle (0, 1) and curves up to (negative 2, 5), and then curves down through (negative 5, negative 4). Another curve starts at closed circle (0, 0) and curves down to (2, negative 4) and then curves up through (negative 4, 0). What are Limit of f (x) as x approaches 0 minus and Limit of f (x) as x approaches 0 plus, if they exist?