$\backslash$table$[[$Standart Sieve Size.,Amount Retained on Each Sieve.$],[63,0],[345,2685],[16,1125],[8,1835],[4,1035],[2,0],[1,0],[0\mathrm{.}5,1500],[0\mathrm{.}25,1530],[$Pan$,290]]$

a$)$ Calculate the fineness modulus?

b$)$ Comment on the grading of this aggregate?

Materials of constructions course