Which statement best describes how the graph of y = f (a + 4) - 7 is a transformation of the graph of the original function f? O The graph of f (a + 4) - 7 is a shift of the graph of f 4 units to the left and 7 units down. O The graph of f (a + 4) - 7 is a shift of the graph of f 4 units to the left and 7 units up. O The graph of f (a + 4) - 7 is a shift of the graph of f 4 units to the right and 7 units up. O The graph of f (a + 4) - 7 is a shift of the graph of f 7 units to the left and 4 units down. The graph of f (a + 4) - 7 is a shift of the graph of f 7 units to the right and 4 units down