For machining a rectangular island represented by coordinates P(0,0), Q(100,0), fl( 100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used. The trajectory of the cutter centre to machine the island PQRS is

(8,8), (94,8), (94,44), (8,44), (8,8)

(- 8, - 8), (108, - 8), (108,58), (- 8,58), (- 8, -8)

(8,8), (94,8), (94,44), (8,44), (8,8)

(- 8,8), (94,0), (94,44), (8,44), (- 8,8)

(0,0), (100,0), (100,50), (50,0), (0,0)

For machining a rectangular island represented by coordinates P(0,0),

1.	For machining a rectangular island represented by coordinates P(0,0), Q(100,0), fl( 100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used. The trajectory of the cutter centre to machine the island PQRS is
A.	(- 8, - 8), (108, - 8), (108,58), (- 8,58), (- 8, -8)
B.	(8,8), (94,8), (94,44), (8,44), (8,8)
C.	(- 8,8), (94,0), (94,44), (8,44), (- 8,8)
D.	(0,0), (100,0), (100,50), (50,0), (0,0)
Answer» B. (8,8), (94,8), (94,44), (8,44), (8,8)

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For machining a rectangular island represented by coordinates P(0,0), Q(100,0), fl( 100,50) and S(0,50) on a casting using CNC milling machine, an end mill with a diameter of 16 mm is used. The trajectory of the cutter centre to machine the island PQRS is

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