a basis for the column space of a is { }. you should be able to explain and justify your answer. enter a coordinate vector, such as <1,2,3,4> or <1,2,3,4,5>, or a comma separated list of coordinate vectors, such as <1,2,3,4>,<5,6,7,8> or <1,2,3,4,5>,<6,7,8,9,10>.