<prompt> Given a list of numbers, write a code to calculate the arithmetic mean.25, 20, 15, 8, 5  <response>: The arithmetic mean of a list of numbers is calculated by adding all the numbers in the list and then dividing the sum by the total number of items in the list.Heres one way to do that in Python:pythonnum_list 25, 20, 15, 8, 5mean sumnum_list lennum_listprintmeanIn this case, the sum of the numbers in the list is 73 and the total number of items in the list is 5. So the arithmetic mean is 735 14.6. 