<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def find_gui_and_backend():
 """Return the gui and mpl backend."""

    matplotlib = sys.modules['matplotlib']
    # WARNING: this assumes matplotlib 1.1 or newer!!
    backend = matplotlib.rcParams['backend']
    # In this case, we need to find what the appropriate gui selection call
    # should be for IPython, so we can activate inputhook accordingly
    gui = backend2gui.get(backend, None)
    return gui, backend