<image>As shown in the , it is a schematic map of a tour route in a scenic area, where B, C, D are scenic spots, and E is an intersection of two roads. The numbers in the image represent the distance between two points in kilometers (km). A student starts from point A and walks at a speed of 2km/h to visit the area, and the staying time at each scenic spot is 0.5h.
(1) When he travels back to point A through the route A-D-C-E-A, it takes a total of 3h. Find the length of CE.
(2) If this student plans to start from point A and maintain the same walking speed and the same staying time at each scenic spot, aiming to visit all three scenic spots and return to A in the shortest possible time, please design a walking route for him and explain the reason for this design (other factors are not considered).