dilution problem

) Calculate the concentration of all the following:
A solution of FeCl3 was prepared by dissolving 13.86 gm of FeCl3 in 2.5L of water.  The following solutions were then prepared by dilution:
Solution A: 75.0 mL of the above solution was diluted to 100.0mL
Solution B: 100.0 mL of solution A was diluted to 2500 mL
Solution C: 5.0 mL of solution B was diluted to 1500mL