The following data are for a liquid chromatographic column
![2158_38769ae7-bc16-40fe-8224-248735e22c15.png](https://secure.tutorsglobe.com/CMSImages/2158_38769ae7-bc16-40fe-8224-248735e22c15.png)
A chromatogram of a mixture of species A. B, C, and D provided the following data:
![1779_71c7bbe3-3407-4b83-9af0-1ccd35a81f23.png](https://secure.tutorsglobe.com/CMSImages/1779_71c7bbe3-3407-4b83-9af0-1ccd35a81f23.png)
Calculate
(a) The number of plates from each peak.
(b) The mean and the standard deviation for N.
(c) The plate height for the column.