Given the following matrices and scalar values determine if the expressions below are defined. If so, calculate their values. If not, explain why they are not defined. Let k = 2. A = [1 9 5 4 3 2] B = [2 -6 6 -1] C = [6 0 3 4 9 -3] (a) (A + kB)^t (b) CB - 1/2A^t (c) 1/7tr(CA)B (d) (A^t)B - kC^t (e) (AC)^-1 Solution Add each elemet of A with corresponding element of B twiced Similar expressions we get a. [2 3 4 5 7 2] b. [5 6 2 0 2 5] c. [3 7 1 5 9 0] d. [4 0 3 4 9 1] e.[4 7 1 3 0 4] .