$\backslash$table$[[$Sieve size,$\backslash$table$[[$Soil $1,],[\%$ Finer$]],\backslash$table$[[$Soil $2,],[\%$ Finer$]]],[$No$.4,99,100],[$No$.10,92,100],[$No$.40,86,100],[$No$.100,78,99],[$No$.200,60,97],[$LL$,20,124],[$PL$,15,47],[$PI$,5,77]]$

Required:

$($a$)$ Using a spreadsheet, plot the grain size distribution curves.

$($b$)$ Classify the soils according to the Unified Soil Classification System.You can only anwswr letter B if you want