Which of the following vectors is in the column space of ab? (you need to enter these vectors as column matrices in matlab.)

[3 9 -7 -2 6 -3 -1]
Let AB= [2 6 0 8 4 12 4]
[2 6 5 18 4 33 11]
[3 9 -2 8 6 18 6]

a. W1= (6,4,4,6)
b. W2= (6,16,4,0)
c. W3= (-4,16,40,20)