An unretained solute passes through a chromatography column in 3.7 min and analyte requires 8.4 min. Find the adjusted retention time and retention factor for the analyte. Find the phase ratio b for a 0.32-mm-diameter column with a 1.0-mm-thick film of stationary phase. Find the partition coefficient for the analyte. Determine the retention time on a similar length of 0.32-mm diameter column with a 0.5-mm-thick film of the same stationary phase at the same temperature.