26. Solving a chemistry problem

38th century To establish the optimal conditions for the separation of a three-component mixture by gas-liquid chromatography using a column of length L, a chromatogram of the mixture was obtained and on the resulting chromatogram for each component the retention distance l and the peak width at the middle of its height a1/2 were measured
Based on the data below, characterize quantitatively the efficiency and selectivity of separation of the components of the mixture by calculating for each component the number of theoretical plates n, the height equivalent to the theoretical plate, HETT, as well as the degree of separation Rs of two components emerging sequentially from the column.
What components are not completely separated under the chromatography conditions under study?
Option L, m No. mixture component l, mm a1/2mm
in 1 1 20 1
2 27 1.5
3 30 2.0