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3. Construct the DAG for the expression: ((a+b) - (a - b)) * (a − b) +((a+b) — (a - b))

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MATLAB Practice: Using version R2021b MATLAB code which tweaks the following code. close allx = 0: pi/100: 2 * pi;wave1 = sin (x * 3);wave2 = sin (x * 7) + cos (x * 8); plot (x, wave1, 'b-', x, wave2, 'r:');legend ('wave 1', 'wave 2');title ('Some Example Data Waveforms');xlabel ('Angle');ylabel ('Amplitude'); a. Use subplot(3,1,x)b. Draw “wave1” with stem function in subplot(3,1,1) with xlabel, ylabel and legendc. Draw “wave2” with stem function in subplot(3,1,2) with xlabel, ylabel and legendd. Draw “wave1” and “wave2” with stem function in subplot(3,1,3) with xlabel, ylabel, legend and title.