You have definitions for two functions. Both functions return a copy of the original array with its elements squared. The first approach, the slower one, uses a for loop to square each element individually, while the second approach leverages vectorization.

Your task is to perform a benchmark of both functions. To do this:

1. Complete the definitions of two functions:
   • The first, with for loop, should be named square_array_slow, and take a single parameter array;
   • The second, with vectorization, should be named square_array_fast, and take a single parameter array.
2. Decorate both functions with the timeit_decorator and set its number parameter to 100.