Equilibrium Constants

Question 1: What is the equilibrium constant (K_eq)defined as?

Question 2: If the K_eq is greater than one,

Question 3: If the K_eq is less than one,

Question 4: At 25°C, zinc sulfide has a K_sp of 3.0 x 10^-23, zinc carbonate has a Ksp of 1.0 x 10^-10, and silver iodide has a K_sp of 8.3 x 10^-17. Order these salts from most soluble to least soluble.