Suppose you wish to show that 8 is in the span of {[4].0) for any a and b. (a) First declare a and b as symbolic variables. (b) Enter a matrix A which can help you show this and use rref on it. (c) Explicitly give the weights w and w2 such that given in terms of a and b.) a [8] = [4] + [1]. W2 b (They should be