The following are the results of a sieve analysis \table[[U.S. sieve no.,Mass of soil retained (g)],[4,28],[10,42],[20,48],[40,128],[60,221],[100,86],[200,40],[Pan,24]] a. Determine the percent finer than each sieve and plot a grain-size distribution curve. b. Determine
D_(10),D_(30)
, and
D_(60)
from the grain-size distribution curve. c. Calculate the uniformity coefficient, Cu . d. Calculate the coefficient of gradation, Cc .