X. X" - Let hand k be positive real numbers. Enter left, right, up or down in the appropriate blank. a. To obtain the graph of y = f(x) + k, shift the graph of f Write your response here... k units. b. To obtain the graph of y = f(x) - k, shift the graph off Write your response here... kunits. c. To obtain the graph of y = f(x + h), shift the graph of f Write your response here... hunits. d. To obtain the graph of y = f(xh), shift the graph of f Write your response here.... hunits.