PLEASE DO $18\mathrm{.}18$ I GAVE $18\mathrm{.}17$ AS

REFERENCE AND VALUES, need done asap thank you

$18\mathrm{.}17($SI units$)$ A cylindrical billet is $200$ mm long and $100$ mm in diameter. It is reduced by indirect extrusion to a $30$ mm diameter. Die angle $=90.$ In the Johnson equation, $a=0\mathrm{.}8$ and $b=1\mathrm{.}5.$ In the flow curve for the work metal, strength coefficient $=250$MPa and strain$-$hardening exponent $=0\mathrm{.}15.$ Determine $($a$)$ extrusion ratio, $($b$)$ true strain $($homogeneous deformation$),($c$)$ extrusion strain, $($d$)$ ram pressure, and $($e$)$ ram force.

$18\mathrm{.}18($SI units$)$ Solve the previous problem except direct extrusion is used instead of indirect extrusion. Determine $($a$)$ extrusion ratio, $($b$)$ true strain $($homogeneous deformation$),($c$)$ extrusion strain, $($d$)$ ram pressure, and $($e$)$ ram force. Solve parts $($d$)$ and $($e$)$ at the following two billet lengths during the process: $L=175mm$ and $L=25mm.$