Answer & Explanation Option: [C]
1 x 25 + 0 x 24 + 1 x 23 + 0 x 22 + 0 x 21 + 1 x 20.1 x 2-1 + 0 x 2-2 + 1 x 2-3 + 1 x 2-4 = 41.6875