Ans$=1\mathrm{.}1$ m $3\mathrm{.}25.$ Dynamic compaction with a tamper weight of $15$ ton and a drop height of $12$ m applies $7$ drops on fill with low degree of saturation. Estimate the crater depth $3\mathrm{.}29.$ A three$-$story structure is to be constructed over an $8000-$m$2$ site. The initial subsurface exploration indicates predominant soil type is a silty fine sand grading to a fine sand with seams of sandy clay. The design indicates that shallow foundations can be used for this project provided the soils were made more homogeneous as far as load support and no voids were present within the depth up to $7\mathrm{.}6$ m below the ground surface. Assume groundwater is not a concern. Dynamic compaction is proposed to improve the ground. The local contractor doing dynamic compaction has a $15-$ton tamper with the diameter of $2\mathrm{.}0$ m and the height of $1\mathrm{.}4$ m$.$ You are requested to conduct the preliminary design for this dynamic compaction project including drop height, spacing, number of drops, number of passes, estimated crater depth, and settlement