is:
1.1 (a) The range of values that can be represented by 12-bit signed binary numbers is -2048 to 2047. is: 1
$$H(z) = \frac{1}{1 - 0.5z^{-1} - 0.2z^{-2}}$$ is: 1
3.2 The FFT of the sequence $x[n] = 1, 2, 3, 4$ is: is: 1
$$h[n] = 0.5^n u[n]$$
4.1 The transfer function of the filter is:
7.1 The output of the downsampler is: