pls can u write sample matlab codes which I can put my audio files

Download and import the wav files contained in this zip file link (use audioread in matlab). These files were sampled at 44100Hz. Extraci the samples between 12 seconds and 24 seconds for each of the signals. Multiply the bass signal by 2.1 and the drumsignal by 0.7 . Then add the extracted signals together to create a new signal of the same length (use sound(new_sig, 44100) to listen to the signat in matlab). Finally sum the absolute values of the samples of the new signal (use sum(abs(x)) in matlab) and enter the result in the answer ficid. Answer: 4. (890.38,6245000000)