The given diagram represents the velocity triangles at the leading edge (1) and trailing edge (2) at the mean radius of a single stage axial compressor rotor. The stage efficiency of the compressor is 0.8. The stagnation temperature of air entering the stage is 298 K and the specific heat at constant pressure for air is 1.005 kJ/kgK The ratio of specific heats for air is 1.4. Considering actual work in the rotor is equal to the ideal work. the pressure ratio for the stage is equal to _______ (in two decimal points).