A spool of copper wire has a starting diameter of D0 = 2.5 mm. It is drawn through a die with an opening that is 2.1 mm. The entrance angle of the die a = 18°. Coefficient of friction at the work-die interface is μ = 0.08. The operation is performed at room temperature. The pure copper has a strength coefficient K = 300 MPa and strain hardening coefficient n = 0.50. Determine (a) area reduction, (b) draw stress, and (c) draw force required for the operation.