5.6 Sample 4 from the previous data set was flooded with crude oil, in several steps, in order to displace the brine. The remaining water saturation and V values were measured at each of these displacement steps. Based on the measured data given in the following and other data from problem 5.5, calculate the true formation resistivity Rt as a function of water saturation Sw and subsequently determine the saturation exponent n of the Archie's saturation equation