The six faces of a single dice are marked with the letters A, B, C, D, E, and F. By observing the standard configurations of the given dice, which letter is on the face opposite to the face with letter 'B'?

Two different positions of the same dice are shown, the six faces of which are numbered from 7 to 12. If the numbers adjacent to 8 are 7, 9, 10, and 11, select the number that will be on the face opposite to the one showing '8'.

Two different positions of a dice are given. When 1 is at the top, which number will be at the bottom if the faces are numbered from 1 to 6 and the sums of opposite faces are not necessarily 7, and 1 shares adjacent faces with 2, 3, 4, and 5?