Calculate the required force for $50\%$ reduction in height in open$-$die forging of a cylindrical, annealed copper specimen $10mm$ high and $25mm$ in diameter for the cases of $($a$)$ no friction between the flat dies and the specimen, $(b)=0\mathrm{.}10,$ and $(c)=0\mathrm{.}30,($d$)$ calculate the work done for each case. Ignore barreling.

$\backslash$table$[[$Material$,$Strength coefficient, $K,\backslash$table$[[$Strain$-$hardening$],[$exponent$,n$