Can you please solve it in details step by step

A solution containing 0.5 wt% of protein and 1 wt% of salt shall be concentrated by ultrafiltration to 5 wt% (of protein). Then the salt concentration shall be reduced by diafiltration to 0.05 wt%. The membrane used in this operation has a protein rejection of 0.9 and a salt rejection of 0.1. How much protein will be lost in these operations