The data given in the table below were obtained from the constant pressure period of a pilot scale plate and frame filter press. A slurry is filtered with plate and frame filter with a filtering surface area 2.72m2 at a constant pressure (P) of 300kN/m2. The mass of solid per unit volume of filtrate was 125g/L, the filtrate viscosity is 103Pa.s and the temperature 25C. Calculate the constants and Rm