6) For the part shown below, prepare a complete process sheet from a stock made of St. 4212 with stock size: D30*300 mm. For roughing, N= 420 rpm, maximum depth of cut= 2 mm, and feed rate= 0.5 mm/rev. For finishing, N= 630 rpm, maximum depth of cut= 1 mm, and feed rate= 0.1 mm/rev.​