The system of equation, if a b are arbitrary numbers x+2y-3z- a 2x+4y-6z 2a+2 has (a) no solutions regardless of values of a and b (b) infinitely many solutions regardless of values of a and b (c) a unique solution if a b-0 d) a unique solution regardless of values of a and b

Chosen according to the volume of oil it can haul, as shown in at a railway yard, locomotives are used to haul containers carrying the table. locomotive capacity a450 0 -750 cubic feet cg35 750-1,500 cubic feet br73 1,500-2,500 cubic feet yh61 2,500-3,500 cubic feet & the four cylindrical containers listed in the table need to be hauled. cylinder length (ft.) diameter (ft.) fill level a 40 , 12 half b 24 8 full c 16 16 full 6 12 full d match each container to the locomotive needed to haulit a450 cylinder a yh61 cylinder d