In a machining operation that approximates orthogonal cutting, the cutting tool has a rake angle 8°. the chip thickness before the cut to= 0.15 mm and the chip thickness after the cut tc=0.3375 mm. calculate: a) the shear plane angle and the shear strain in the operation b) the shear strength of the work material assuming the cutting and thrust force were measured to be fc = 679.5 n and ft=535.5n. the width of the orthogonal cutting operation is w= 2.5 mm. c) the friction and the coefficient angle d) the cutting power and specific energy in the machining if the cutting speed 60 mm/min