The following functions are all intended to check whether a string representing a dna sequence contains any characters that are not 'a','c','g','t', 'A', 'C', 'G', or 'T'. At least some of these functions are wrong. Which ones are correct?

Q/Complete the following code in Python language (biometrics) for voice recognition and apply the code, mentioning the approved source if it exists import osimport numpy as npfrom pyAudioAnalysis import audioBasicIO, audioFeatureExtraction, audioTrainTestfrom pydub import AudioSegment# Function to capture and save voice samplesdef capture_voice_samples(num_samples, speaker_name):os.makedirs("speakers", exist_ok=True)os.makedirs(f"speakers/{speaker_name}", exist_ok=True)for i in range(num_samples):input(f"Press Enter and start speaking for sample {i + 1}...")# Recording audio using pyAudioAnalysisaudio = audioBasicIO.record_audio(4, 44100)filepath = f"speakers/{speaker_name}/sample_{i + 1}.wav"audioBasicIO.write_audio_file(filepath, audio, 44100)print(f"Sample {i + 1} saved for {speaker_name}")# Function to extract features from voice samplesdef extract_features():speakers = [d for d in os.listdir("speakers") if os.path.isdir(os.path.join("speakers", d))]all_features = []all_labels =…

5. use c code to Write a stringSearch function that gets two strings one called needle and the other called haystack. It then searches in the Haystack for the needle. If it finds it, it returns the index of where the needle starts in the haystack. If the needle cannot be found, it should return -1 Prototype: int stringSearch(char needle[], char haystack) Example1: Haystack: “This is just an example” Needle: “just” Result: 8 Example2: Haystack: “This is just an example” Needle: “This” Result: 0 Example3: Haystack: “This is just an example” Needle: “this” Result: -1 Hint: all the answer need to include an output and use c code to answer