A saturated solution of copper(II) iodate in pure water has a copper-ion concentration of 2.7 10-3

Question:

A saturated solution of copper(II) iodate in pure water has a copper-ion concentration of 2.7 × 10-3 M.
a. What is the molar solubility of copper iodate in a 0.35 M potassium iodate solution?
b. What is the molar solubility of copper iodate in a 0.35 M copper nitrate solution?
c. Should there be a difference in the answers to parts a and b? Why?