Hi can someone please help analyse this result from isolation and analysis of milk protein lab?

These are the questions.

Are there one or more protein bands in the sample wells? Which proteins make up the different protein bands (compare with the size of the protein bands in the protein standard to identify the different milk proteins).

Does the sample have the proteins you expected? (I don't know what to answer)

1 is casein, 2 is whey. 3 is proteinstandard.

1 2 3 -250 -150 -100 -75 -50 -37 -37 -25 -20 15 Std