Noise reduction and audio optimization

Good morning. I have a meditation audio whose voice tracks are too noisy. I need a person with audio knowledge to clean the voice tracks and optimize the whole audio. I will send you the four tracks separately in .wav and the project in .aup. The file "pista de audio-2" starts at 5m12s. The complete audio lasts less than 7 minutes. I don't know much about sound editing but it would be great to have the job done today. Thank you very much. Translated with [login to view URL]