Write a Python program that calculates the area and circumference of a circle. However, you

want to ensure that the value of Pi used in the calculations remains consistent throughout the

program. Use a global constant for the value of Pi $($Assign it to $3\mathrm{.}14),$ and then write the program

that uses a global constant for Pi to perform these calculations.

Steps:

$-$ Create a python file $$circle$.$py$.$

$-$ Initialize a global variable pi to $3\mathrm{.}14$

$-$ Write two functions to calculate area and circumference of the circle respectively.

$-$ Get the radius as input from the user.

$-$ Calculate the area and circumference by calling the above defined functions and print them.