This can be stated in active form. Alternate translation: "People must be able to attest to her good deeds" (See: [[rc://en/ta/man/translate/figs-activepassive]])
Washing the dirty feet of people who have been walking in the dirt and mud is one way of meeting other people's needs and making life more enjoyable for them. This probably means she did humble work in general. Alternate translation: "has done common work to help other believers" (See: [[rc://en/ta/man/translate/figs-metonymy]])
Here "the afflicted" is a nominal adjective that can be stated as an adjective. Alternate translation: "has helped those who are suffering" (See: [[rc://en/ta/man/translate/figs-nominaladj]])