Please complete $8\mathrm{.}29$ but with sigma $1$ and $3$ doubled compared to what is given. Please draw out the mohr circles in excel or on paper and add a stress path $($p$\text{'}-$q$)$ plot to supplement the mohr circles plot. Thank you kindly!!

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$8\mathrm{.}29$ A triaxial specimen of loose sand is first consolidated nonhydrostatically, with ${}_1=20$kPa and ${}_3=11$kPa. The sample is then failed by holding the vertical stress constant and decreasing the horizontal stress $($this is a lateral extension test$).$ The angle of internal friction is $34)=(0.($a$)$ Draw the Mohr circles for both initial and $"$at failure" conditions. $($b$)$ What will be the major and minor principal stresses at failure?