PYTHON PROGRAMMING help, please.

Given three sets, set1, set2, and set3. Write Python statement(s) to perform the following actions:

a. Create a new set of all elements that are in set1 or set2 but not both.

b. Create a new set of all elements that are in only one of the three sets set1, set2, and set3.

c. Create a new set of all integer elements in the range 1 through 25 that are not in set1.