import math import random import string import collections import datetime import re import time import copy # YOUR CODE BELOW...  def writeVertical(n) : # your code here... # end def def digitalSum(n) : # your code here... # end def def exponents(a, b) : # your code here... # end def def invertedImage(top, bottom, n) : # your code here... # end def  def main( ) : writeVertical(98312) print(===) writeVertical(0) print(===) writeVertical(-123456789) print(===) digitalSum(1234) print(===) exponents(3, -4) print(===) exponents(16, 0) print(===) exponents(0, 9) print(===) exponents(-18, 7) print(===) exponents(12, 12) invertedImage('*', '#', 6) print(===) invertedImage('@', '^', 18) # end main( ) if __name__ == "__main__" : main( ) 

Question 3: Write a Python function called 'exponents' that uses recursion to calculate and display the value of 'a' to the power 'b'. NOTE: Both 'a' and 'b' can be positive or negative and any number raised to the exponent 0 is 1, and if the base is 0, the result will always be 0. For example, exponents(3, 3) will display: 27 For example, exponents(3, -4) will display: 0.012345679012345678 The function prototype MUST be: def exponents(a, b) :