$(5$ points$)5.$ Determine the average permeability, $k_{\text{a}\text{v}\text{g}},$ of a linear horizontal flow of the system in

the first upper layer system $(k_1$ and $k_3)$

a$)350md$

b$)550md$

c$)480md$

d$)375md$

$(5$ points$)6.$ Determine the average permeability, $k_{\text{a}\text{v}\text{g}},$ of a linear horizontal flow of the system in

the second lower layer system $(k_2$ and $k_4)$

a$)375md$

b$)480md$

c$)550md$

d$)350md$

$(5$ points$)7.$ Determine the average permeability, $k_{\text{a}\text{v}\text{g}},$ of a linear horizontal flow of the whole

system?

a$)480md$

b$)375md$

c$)428md$

d$)550md$