Problem 7: Consider a canonical direct form II implementation of the following transfer function with fixed-point 2's complement representation with 8 fractional bits:
$$H(z) = \frac{1}{1 - 0.5z^{-1} + 0.4z^{-2}}$$
Determine the range of filter initial conditions that can result in granular, zero-input limit cycles.
(5 points)