Find each x-value at which f is discontinuous and for each x-value, determine whether f is continuous from the right, or from the left, or neither. f(x) = {x + 4 if x < 0 4x2 if 0 ≤ x ≤ 1 4 − x if x > 1 x = (smaller value) continuous from the right continuous from the left neither x = (larger value) continuous from the right continuous from the left neither Sketch the graph of f.