Amount of energy consumption for unit volume of metal removal is maximum in

Increase in rake angle causes ..........A................ in chip thickness and .............B......... in shear angle

(a) increase / reduction
(b) increase / decrease

Thrust force in drilling can be reduced by .................A............... the point angle and by ..........B.......... the helix angle of the drill

(a) increasing / reducing
(b) increasing / reducing

In comparison to $$HSS$$, super $$HSS$$ contains higher percentage of