A soil sample is subjected to an initial equal-all-around hydrostatic state of stress of 50 kPa. Sketch the stress paths for the loading conditions when
(a) σ h remains constant and σ v increases to 100 kPa;
(b) σ v is held constant while σ h increases to 100 kPa;
(c) Both σ h and σ v are increased to 100 kPa;
(d) σ v remains constant while σ h decreases to 10 kPa;
(e) σ v is increased by 25 kPa at the same time that σ h is decreased by 25 kPa.