#ques1. (MATLAB) Generate 100 samples of the signal  = sin (0.125). We want to decimate this 
signal using D = 2. 
• Design a 25-order lowpass filter using the Parks-McClellan algorithm. Choose the 
appropriate band-edge frequencies and equal ripple values to obtain h. 
• Implement the decimator using function filter. Plot and  the steady-state values of 
the outputtion..