Chemistry problem help!?

A 10 mL sample of a solution containing a monoprotic weak acid was placed in a 100 mL volumetric flask, diluted to the mark with water and mixed well. A 25 mL aliquot of this diluted acid solution was then titrated with NaOH. If the titration required 17.23 mL of .09913 M NaOH to reach the equivalence point, calculate the molarity of the acid in the dilute and the original solution (that is, before dilution).