If the following section is made from a material having an elastic perfectly plastic behavior with ${}_y=25$ksi, determine the location of the neutral axis $($NA$)"$d$"$ if a fully plastic bending moment $M_p$ is applied to the section and what would be the value of this moment?

Select one:

$d=20in.$ and $M_p=3125$kip.in$.$

$d=25in.$ and $M_p=59375$

kip.in$.$

$d=30in$ and $M_p=5900$kip.in$.$

$d=25in.$ and $M_p=47500$

kip.in$.$