A cylindrical workpiece is subjected to a cold upset forging operation. The starting piece is $79$mm in hieghht and specified diameter. It is reduced in the operation to a height of $59$mm and $47$mm in diameter. The work materials have flow stress of $197$MPa. Assume a coefficient of friction of $0\mathrm{.}15.$ Determine the forging force i$($in N$)$ at the intermediate height of $59$mm