In a rectangular room with the following dimensions: 12 feet wide, 12 feet high, and 30 feet long, a fly sits at one end of the room on the 12x12 wall, the fly is 6 ft from each wall and 1 foot from the floor. in the same room is a spider sitting on the opposite 12x12 wall, the spider is 6 ft from each wall and 1 foot om the ceiling. what is the shortest distance between the fly and the spider if the spider must crawl along a surface to get to the fly and the fly does not move?