Please solve:

***Note: If you do not want to solve both, please prioritize part b).

Find the following: a) Suppose we have az = (1,0,2,1)", az = (1,1,3,2), az = (1,-1,2,0)", m = (3,2,-1,2). If we let A = {az, az, az} and B = Span(A), find Projs(m) b) Suppose C = Mkxx(R) with rank(C) = k. Suppose d e R". Find a formula that encompasses the terms of C and d for the point x R with Cx = Cb which is the closest (or nearest) to the origin. Find the following: a) Suppose we have az = (1,0,2,1)", az = (1,1,3,2), az = (1,-1,2,0)", m = (3,2,-1,2). If we let A = {az, az, az} and B = Span(A), find Projs(m) b) Suppose C = Mkxx(R) with rank(C) = k. Suppose d e R". Find a formula that encompasses the terms of C and d for the point x R with Cx = Cb which is the closest (or nearest) to the origin