Q$4(20\%)$ A $60$ mm diameter $100$ mm height aluminum block is to be forged to $60\%$ reduction in height. The stress$-$strain characteristics of the material is approximated as ${}_0=75{}^{0\mathrm{.}13}$MPa. Making necessary assumptions, determine the required press capacity. friction load and work done for:

a$)$ No friction condition,

b$)$ Friction coefficient is $0\mathrm{.}4$