or Is this a low pass high pass filter and where is the 3dB down point?

Q2 Design a frequency be 1000 Hz and the upper cutoff frequency be 3000 Hz and assume a sampling frequency of 8,000 Hz. Give the transfer function and the difference equation of the designed 7 tap band pass FIR filter using the frequency sampling method. Let the lower cutoff filter.

2. The analog signal shown in the following figure is to be delta modulated. The sampling period and the step size are indicated by the grid on the figure. Draw the staircase function that follows the signal as closely as possible and write down the delta modulation output.

a. What is the significance of the name IIR in the IIR filter? b. How negative feedback is more stable than positive feedback?