Predict the Molar Solubility of the Following Salt in a Solution

Predict the molar solubility of the following salt in a solution that contains the given concentration of one of its ions: AgI; [I-] = 7.2 × 10^-6 M; Ksp = 8.5 × 10^-17

A) 2.4 × 10^-11
B) 9.2 × 10^-9
C) 1.7 × 10^-6
D) 2.7 × 10^-4
E) 1.2 × 10^-11