I don't understand how people play by ear ._.

does anyone know where to find/have piano sheet music for the following songs?

- Islands (Super Junior)

- Dorothy (Super Junior KRY)

- Don't Leave Me (Super Junior)

- U R (Taeyeon)

- Passing By (Lee Hi)

- Like A Star (Ryeowook)

- Big Mini World (Jessica Jung)

or is it possible, if anyone knows how to play by ear, for you to create sheet music for me?  it would be highly appreciated and I'm willing to pay in karma points?