Alevel chemistry Titration concentration of solution help

14 A solution of 0.100 mol dm - silver nitrate is added to
5.00 cm of 0.500 mol dm 3 sodium chloride solution until the reaction is complete.
Ag*(aq) + CI-(aq) → AgCI(s)
a Calculate the number of moles of sodium chloride in
5.00 cm' of 0.500 mol dm 3 solution.
b How many moles of silver nitrate must have been added to react with the sodium chloride?
c What volume of silver nitrate solution must have
been used?
How do I do this question??