A soil element is shown below. Preferably using the pole method, answer the following questions $37$ to $40$ :

$37.$ What is the maximum principal stress, or$?$ Select the closest value.

a$)220$kPa

b$)200$kPa

c$)100$kPa

d$)50$kPa

c$)30$kPa

$38.$ Where is the location of the pole $(,)?$

a$)(50,-62)kPa$

b$)(200,62)kPa$

c$)(25,0)kPa$

d$)(50,62)kPa$

e$)(200,-62)kPa$

$39.$ What is the normal stress, ${}_{2n}$ on plane $AB?$ Select the closest value.

a$)220$kPa

b$)215$kPa

c$)200$kPa

d$)110$kPa

e$)50$kPa

$40.$ What is the shear stress, ${}_{},$ on plane AB$?$ Select the closest value.

a$)-95$kPa

b$)-65$kPa

c$)95$kPa

d$)65$kPa

e$)0$kPa

$41.$ For Geotechnical sign convention, compression is positive; tension is negative; anticlockwise moment is positive. Is it true?

a$)$ True

b$)$ False

c$)$ It depends

$42.$ For Mohr's Circle construction, which of the following stresses acting on the principal planes?

a$){}_x$pro$gm{a}_3$

b$){}_1$&${}_3$

c$){}_a$&$r_a$

d$){}_v$&${}_k$

e$)$ all of the above