Indicate the meaning of the following commands:

Question

This program drills two holes using a CNC machining centre. Indicate the meaning of the following commands:              

PROGRAM	f0001
N005	G54	G90 S499M03
N015	G43	X1. Y1.
N020	G01	Z-1.2 F3.5
N025	G00	Z.1
N030	X2
N035	G01	Z-1.25
N040	G00	Z.1 M09
N045	G91	G28 Z0
N050	M30

Note: f indicate letter O and 0 indicates numeral zero.