Let 47 {1,22,23} and B = {b,,b2,b3} be bases for a vector space V, and suppose a1 2b1-b2a2b+4b2 + b3 a3 = b2 - 5b3 a. Find the change-of-coordinates matrix from A to B. b. Find [x]s for x = 3a +4a2 + a3