Calculate the following determinants, using suitable elementary row operations for (b) and (c): 2 2 3 4 5 6 31 32 33 (a) 0 3 5 (b) 5 6 8 (c) 32 33 35 0 4 6 46 6 7 9 33 34 36 3. Find A when (A-1 – 21_)' = -2 A A-(10) e -