Exercise: Write a function that takes three numbers as arguments and return their product.

Exercise: Change the function so it only takes one argument, get another from the global scope, and assigns to a local variable for the last value.

Exercise: Write a function that takes two lists as its input and return the longest of the two.

Exercise: The distance between two points, (x1,y1) and (x2,y2) is √(|x1-x2|²+ |y1-y2|²). It follows from Pythagora’s Theorem (as you should be able to see using a small drawing). Write a function that computes the distance between two functions. You can use the sqrt() function to get the square root, but you need to import it from the math module first:

from math import sqrt