A soil sample is subjected initially to an equal all round stress of $100$ kPa $.$ Draw stress paths for the loading conditions, when $($a$){}_L$ is held constant and ${}_v$ increases to $200$ kPa $,($b$){}_h$ and ${}_v$ are both increased to $200$ kPa $,($c$){}_v$ is held constant and ${}_h$ is increased to $200$ kPa $,($d$){}_v$ is held constant while ${}_h$ is decreased to $25$ Kp a $,($e$){}_v$ is increased by $50$ kPa while ${}_h$ decreases by $50$ kPa $,$ and $($f$){}_h=\frac{{}_v}{4}.$