Asoil sample is collected and taken to the lab. the volume of the sample is 75 cm3. at the natural-water content, the sample weighs 168.00g. it is then saturated with water and reweighed. the saturated weight is 171.25g. the sample is gravity drained, and its weight is found to be 160.59g. finally, it is oven-dried; the dry weight is 157.22g. assume the density of water is 1.0g/cm3 and the density of the soil grains is 2.65g/cm3. find each of the following:

a. volumetric water content
b. gravimetric water content
c. saturation ratio
d. porosity
e. specific yield
f. specific retention
g. dry bulk density
h. porosity computed from density