fill in the blanks

live in a country that majority the people not really have religion or the muslim community are too small makes everything you do seems weird..
termasuklah pemakaian,percakapan,perbuatan dan segala 'per' lah..
the most basic things is clothes especially hijab..
and the second thing is wudu' and solat..

so,this time i would like to ask some help from anybody to fill in the blanks about wudu'...

situation 1

(i think woman more curious than man,so i put a lady instead of a guy)
a student want to perfom a prayer and she needs to pray at the faculty..
so,she have to take wudu' first in the toilet-sink(of course right?)
after finish have her wudu' a lady came to her and ask her questions

wudu'

a lady: i'm sorry, may i ask you?what are you doing?
student: __________________________________

a lady: why you need to wash your face,hand, socks sometimes shoes?
student:________________________________

a lady: why only face,hand and socks?
student:________________________

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i can only think 3 questions,but if i have any questions more i will paste again..however can anybody help me fill in the blank?
and just a reminder, this people don't have belief and the way to answer this question is not the same way to the people that have belief as you need a right words to told them everything..
so,i hope anybody can help me answer those questions as i don't really know how to provide a right answer..

thank you for your kindness and help..and i'm a person who lack of knowledge and need to learn more..