(1 point) Determine the value(5) of a: such that 6 1 6 :r: [m 2 1] 1 3 3 1 =[0] 25 1 4 3:: Note: If there is more than one value separate them by commas. (1 point) Let z = - 5 - 4i. Calculate the following: (a) z2 + 2z + 1 = + (b) 22 + iz - (-1 + i) = + i , (c) (z - 1)2 = + Z