find cutting force and cutting power assuming orthogonal machining

Question

A cutting tool is designated in ‘Orthogonal Rake System’ as:

0⁰ – 0⁰ – 6⁰ – 6⁰ – 25⁰ – 75⁰ – 0.8mm

The following data were given

S₀ = feed = 0.2 mm/rev

T = depth of cut = 2.0 mm

V_f = chip velocity = 52.6 m/min

t_s = dynamic yield shear strength = 400 MPa

P_z = main cutting force= S₀ t τ_s  (ξ sec Ɣ - tan Ɣ + 1)

Where ξ = chip reduction coefficient and

Ɣ  = orthogonal rake

The main cutting force (P_z) and cutting power assuming orthogonal machining are