a$)$ Write down the values of horizontal and vertical stresses for the different fault types shown in the following figures.

${}_v=?$

${}_v=?$

${}_v=?$

${}_{h_1}=?$

${}_{h_2}=?$

${}_{h_2}=?$

${}_{h_2}=?$

b$)$ Sketch the Mohr circles for each fault case above and find the friction angles for the faults.