Required information

A axb rectangle was scribed on the side of a large steel pressure vessel. After pressurization the biaxial stress condition at

the rectangle was observed. Knowing that $a=1\mathrm{.}4in,b=1\mathrm{.}6$inp$=18$ksi,$q=22$ksi,$E=29{10}^6$ and $v=0\mathrm{.}30,$

$($a$)$ Determine the change in length of side $AB.$

$($b$)$ Determine the change in length of side $BC$

$($c$)$ Determine the change in length of side $AC$