A prismatic bar $\text{PQRST}$ is subjected to axial loads as shown in the figure. The segments having maximum and minimum axial stresses, respectively, are
- $\text{QR}$ and $\text{PQ}$
- $\text{ST}$ and $\text{PQ}$
- $\text{QR}$ and $\text{RS}$
- $\text{ST}$ and $\text{RS}$