Problem Set 3
^^^^^^^^^^^^^

.. admonition:: Problem 3.1
   :class: Note

    Fix the errors in the following Python code, which is meant to return the sum of ``a`` and ``b``::

        fed add_two_numbers(a,b,):
            c = a+b-
            return b
		
.. admonition:: Problem 3.2
   :class: Note

    Create a Python program (call it ``cs2120_grades.py``) which calculates a student's grade letter (i.e. ``B``) in this course based on their activity, assignment, and exam marks. 

    Assume that we have 2 activities each worth 5%; recall that the assignments are worth 10%, 10%, 10%, and 20%; finally, recall that the exam is worth 40%. 

    Your code should include your function and a printed function call with each grade as an argument (parameter value).

    Here is an example of what your printed function call would look like::

    	print(calc_grade(70,80,90,100,50,60,80))
    	>> "B"