Al, Ben, Audrey, and Brenda are standing in a rectangular room. Two of them are standing at the north wall, facing south, and the other two are standing at the south wall, facing north. Two of them are standing on the west side of the room, facing each other, and the other two on the east side, facing each other. Here are some facts:
The tallest of the four is facing the shorter person whose name starts with the letter A.
The shorter male is standing diagonally across the room from the taller person whose name starts with the letter B.
The taller male and the shorter female are standing at the same wall.
Who is the shortest?