The following data were obtained for a separation using a 0.5 mm id, 0.85 m open tubular column: Retention time (min) Peak base width (min) Unretained Cyclohexane Methylcyclohexane Toluene 2.0 8.0 0.65 8.17 0.72 10.2 0.95 Calculate: a. The average number of plate for the column. b. The plate height. c. The resolution between the peaks Cyclohexane and Methylcyclohexane. d. The retention factor for Toluene. From the answer, state the result of separation (i.e. poor, slow or optimum)