Replicate Four Wavy Backgrounds in AI

I need the four attached graphics rebuilt from scratch in Adobe Illustrator so I can edit every element later on. Please ignore any text or photos that appear in the originals; the job is solely to recreate the colourful backgrounds and their flowing, wavy shapes as an exact replica... (Budget: £10 - £20 GBP, Jobs: 2D Drawing, Adobe Creative Cloud, Adobe Creative Suite, Adobe Illustrator, Graphic Design, Illustration, Illustrator, Logo Design, Pattern Design, Photoshop)