A gas mixture contains helium (He ), argon (Ar) , neon (Ne ), Xenon ( Xe), and krypton (Kr) gases. The total pressure of the gas mixture is 1252.5 mm Hg. The partial pressures of He, Ar , Ne, and Xe are 0.32, 0.21, 0.44, and 0.19 atm, respectively. What is the partial pressure exerted by Kr?