R Gi ven a “flatten” dictionary object, whose keys are dot-separated. For example, { ‘A’: 1, ‘B.A’: 2, ‘B.B’: 3, ‘CC.D.E’: 4, ‘CC.D.F’: 5}. Implement a function in any language to transform it to a “nested” dictionary object. In the above case, the nested version is like: { ‘A’: 1, ‘...