Fuzzy Randomized Confidence Intervals // Contains the methods proposed by Geyer and Meeden (2005)doi:10.1214/088342305000000340 and Trigo et al. (2025) doi:10.47749/T/UNICAMP.2025.1500297 to construct fuzzy confidence intervals. Compute and plot the fuzzy membership functions of the methods, and the expected length compared with the infimum.