An alien intercepted your cell phone conversation with your friend and says "U, V, W, X, YU, UU, VU, ...!" You have enough knowledge of this alien language to understand that the alien was counting "1, 2, ..." in her place value system. Which of the following best describes this alien numeration system? Group of answer choices Base four positional system with positioning digits in reverse order. Base five positional system with the usual order of positioning digits. Base four positional system with base five digits. Base five positional system with base four digits. Base five positional system with positioning digits in reverse order. Base four positional system with the usual order of positioning digits