PLS SOLVE USING MOHR CIRCLE AND NOT FORMULAS AND MAKE SURE THE ANSWERS MATCH

For the soil element shown opposite: $L=45\mathrm{.}0,M=14\mathrm{.}0,N=32\mathrm{.}0$ b$)$ What angle does the plane of maximum shear stress make with the horizontal? $($in degrees$)$

Correct answer, well done.

c$)$ Find the normal stress on plane PS$.($kPa$)$

Incorrect answer.

c$)$ Find the shear stress on plane PS$.($kPa$)$

Incorrect answer. A correct answer is $53\mathrm{.}9,$ which can be typed in as follows:

$53\mathrm{.}9$

A correct answer is $23\mathrm{.}1,$ which can be typed in as follows:

$23\mathrm{.}1$

A correct answer is $77\mathrm{.}55,$ which can be typed in as follows:

$77\mathrm{.}55$

A correct answer is $24\mathrm{.}5,$ which can be typed in as follows:

$24\mathrm{.}5$

A correct answer is $-6\mathrm{.}5,$ which can be typed in as follows:

$-6\mathrm{.}5$

a$)$ Determine the magnitude of the major? $(kPa)$

Correct answer, well done.

and minor principal stresses? $($ kPa