Question $2)(40$ marks$)$: An inclined permeameter tube is filled with layers of soil of different permeability as shown below.

Find:

a$)$ the total head at point $B$ with respect to the given datum$(30$ marks$)$

b$)$ Elevation head at point B with respect to the given datum, $(5$ marks$)$

c$)$ Pressure head at point B with respect to the given datum $(5$ marks$)$

Assume: $3K_1=K_2=2K_3=1\mathrm{.}5K_4$