Which of the following statements is/are true? If f (c) is an increasing function, then g(c) = 6f (z - 6) is also increasing but h(z) = - f(c) is decreasing The graph of f( + 6) is obtained by shifting the graph of f (z) to the left by 6 units. The graph of an odd function is symmetric with respect to the y-axis. The graph of every function crosses the y-axis exactly once. The graph of every quadratic function crosses the c axis twice