please use python and also show the indentation of the code

#Question 1: start def Leibniz_sum(n): "" Write the code for the function, and check using test cases below to make sure that it's correct you will use this function to answer Question 1 in the next cell # insert your code here # test cases to try out print(Leibniz_sum(0)) # should print 4.0 print(Leibniz_sum (20)) # should print 3.189184782277596 print (Leibniz_sum(1000)) # 3.1425916543395442 #Question 1: continued # Write code to find n and the corresponding approximation of pi # (remember to run teh above cell before running this one) # for this part, you can either write a function, or just write plain code, up to you. import math # insert your code here