The inverse of a map is a new map where the values of the original map become the keys of the new map and the keys become the values. For example, given the map {1:2, 3:4}, the inverse is the map {2:1, 4:3}. Given the map, d, create the inverse of d. Associate the new map with the variable inverse. You may assume that there are no duplicate values in d (that is no two keys in d map to the same value).