4.) Write a simple Python function that will accept two parameters. It should raise
the first parameter to the power of the second parameter. If only one
parameter is passed, it should square the number.
5.) Using list comprehension only, create a new list containing the sum of each number with every
number in the list. Ex: Given [1, 2, 3], you should generate [2, 3, 4, 3, 4, 5, 4, 5, 6]