(Solved): A square yellow-brass bar must not stretch more than 2.8mm when it is subjected to a tensile load ...

A square yellow-brass bar must not stretch more than $2.8\mathrm{mm}$ when it is subjected to a tensile load of $36\mathrm{kN}$. Given: $E=105\mathrm{GPa}$ and that the allowable tensile strength is $108\mathrm{MPa}$, determine (a) The allowable side length of the cross-section (b) Is the allowable value a maximum or a minimum? Why? (c) The allowable length of the bar (d) Is the allowable length a maximum or a minimum?