solve in python

5. Write the three functions described below. The functions should return a new set. Use the function header given for each problem. Lastly, provide a test program for all three functions. If you would like a more challenging question, try to implement the functions without using any set methods. (a) The function takes two sets, set1 and set 2 and returns a new set of all elements in set 1 and set 2 but not in both. def symmetricDifference ( set 1,set2) : (b) The function takes three sets and returns a new set of all elements that are in only one of the three sets. def foundOnce ( set 1,set2,set3) : (c) The function takes three sets and returns a new set of all elements that are in exactly two of the three sets. def foundTwice (set1,set2,set3)