Design using active circuits with operational amplifiers:
a. A lowpass filter with cutoff frequency of 100 kH.
b. A highpass filter with cutoff frequency of 1000 kH.
c. A bandpass filter with passband from 100 to 1000 kH.
d. A bandstop filter with stopband from 100 to 1000 kH.
e. Three cascaded lowpass filters with the same cutoff frequency.
What do you conclude by putting six such filters in cascade?