Write a Python script to determine the smallest positive double-precision floating point number in Python. Your code should define a variable called smallest_num which is the smallest double number in Python. Your script should determine this value in a systematic manner. You may NOT simply call a built-in function that returns this value or access a built-in variable that contains this information. This includes np.finfo() and other built-in functions or variables. Your code snippet should define the following variables: Name smallest_num Type floating point Description The smallest number possible in Python