A sand cone test was conducted for quality control during the compaction of sandy clay. The data are as follows.
(a) Determine the dry unit weight.
(b) The standard Proctor maximum dry unit weight of the sandy clay is 17.8 kN /m3 at an optimum water content of 10%. The specification requires 95% Proctor dry unit weight at acceptable water contents ranging from 9% to 10.8%. Is the specification met? Justify your answer.