I'm not sure how to do this one

At 22 °C an excess amount of a generic metal hydroxide M(OH)2 is mixed with pure water. The resulting equilibrium solution has a pH of 10.26. What is the Ksp of the salt at 22 °C?
Please help thank you!

www.jiskha.com/questions/705837/At-22-C-an-excess-amount-of-a-generic-metal-hydroxide-M-OH-2-is-mixed-with-pure