$/6$ pts $6.$ Use the figure below to answer the following questions.

a$)$ Sketch the trend in hydraulic head along the length of the apparatus shown here. Flow is moving

from right to left and the starting value of hydraulic head is indicated by the dash mark on the $y-$

axis on the right side of the diagram. The exact values of head don't matter, focus on the

relationships between the lateral gradient in each section of the apparatus. $(4$ pts$)$

b$)$ Explain how you drew the head distribution in part $($a$)$ using words and$/$or Darcy's Law. $(2$ pts$)$

$14$ pts $7.$ A pure clay has a porosity and water content of $n==0\mathrm{.}44.$ Estimate the mass of $1m^3$ of this clay

when saturated. Describe all important assumptions made for your estimate and show your work.