Calculate kp PLEASE HELP!!?

Hydrogen peroxide (H2O2) decomposes according to the equation H2O2(l) → H2O(l) + (1/2)O2(g). Calculate Kp for this reaction at 25 °C. (ΔH° = -98.2 kJ/mol, ΔS° = 70.1 J/K·mol, R = 8.314 J/K mol)