1. (5 points) Create a Python function that calculates the area of a circle using a function. Pass the value of radius as parameter. Test the function from Python. 2. (5 points) Use the function created in #1 in a program that prompts for radius of the circle and calculates the area when called. Output the area to include one decimal place. 3. Given the python program: def f(n): n+=3 n = 5/ (3-n) return n print (f (5)) r = f (-4) print (r) a. (7 points) Explain in detail each statement in the program. b. (3 points) What is the result of a call to f(0)? What would you suggest to correct the program? 4. (5 points) Create a Python function for the following scenario: Input: Number of rows for the pattern (For example, 4} Output: 1 12 123 1234