3 Multiple Choice and Fill in the Blank Exercises 3.1} Circle possible if the set of conditions are create a situation that is possible, otherwise, circle impossible. You do not need to explain your reasoning. (a) Matrix A has dimensions 5 x 7,. rank(A) = 2, dimfNulfAD = 3. possible impossible (b) Matrix A has dimensions 5 x 'i', rank{A) = 5, dim(Nul{A)) = 2. possible impossible (:2) Matrix A has dimensions 5 x T, rank{A) = 6, dimfNuHAD = 1. possible impossible (d) Matrix A isn x n, A is singular, det{A} = 0, and TH?) = Art' is not one-to-orue. possible impossible (e) E is a singular elementary matrix. possible impossible (f) Matrix A is a standard matrix for a linear transform that performs a projection in R\