Problem $4\mathrm{.}7$ on Coduto's book on page $138($Assume Ground Water Table is $15ft$

deep; CPT testing results are slso provided below$).(10$ Points$)$

$4\mathrm{.}7$ Using the cone penetration test data in Figure $4\mathrm{.}14,$ a unit weight of $115l\frac{b}{f}{t}^3,$ and an over$-$

consolidation ratio of $3,$ compute the following for the soil between depths of $21$ and $23ft.$

Use a groundwater depth of $15ft$ below the ground surface.

a$.$ Soil classification

b$.D_r($assume the soil has some fines, but no mica$)$

c$.$ Consistency $($based on Table $3\mathrm{.}3)$

d$.{}^{\text{'}}$

e$.N_{60}($use an estimated $D_{50}$ of $0\mathrm{.}60mm)$