Heptane and toluene were separated with retention times of 15.4 and 16.5 min respectively on a 1.0 meter packed column. An unretained species passed through the column in 1.8 min. The peak widths measured at the base were 1.15 for heptane and 1.20 min for toluene. (i) Calculate the resolution between the peaks. (ii) Calculate the average number of plates for the column. (iii) (iv) Calculate the average plate height. Calculate what column length will be necessary to achieve a resolution of 1.5 on this column.