10-2 03-3 and b -49 4 a. Is bin (a, a, a)? How many vectors are in (a,. 0. 0}? b. Is b in W? How many vectors are in W? c. Show that a, is in W. (Hint Row operations are unnecessary 5 9 Denote the columns of Aby a, a, a, and let W-Span (2) Let A a is b in (. a. a)? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. OA. Yes b is in (a,..) since ba (Type a whole number) O. Yes, bis in (a) since, although b is not equal to a,.a. or a. it can be expressed as a linear combination of them in particular, b), (( (Sempilly your answers) OC. No. b is not in (a, a, a) since it cannot be generated by a linear combination of a, a, and a OD. No, b is not in (a) since b is not equal to .ay, or a M