COSC 120    IN CLASS EXERCISE   2/16/2017

This must be completed during class on 2/16/2017.  Open book, open computer.

No collaboration!  Ask Haynes or Fu for explanations.  We won't help debug code this time.

Write Python scripts to do the following:

1. Add up all the numbers in a list of any size.

Eg:  addUp( [1, 2, 3, 4] )  ---> 10

2. Add up every other number in a list of any size.  Remember % operation

Eg:  addUpEO( [ 1, 2, 3, 4, 5] ) ---> 9


3.  Given a list of tuples of the form (number, string) of any size, add up all the numbers.

Eg:  addUpTuples( [ (1, "h"), (2, "i"), (3, " "), (4, "!") ] ) ---> 10


4.  Using the program paradigm we have been using to compute, eg, predator-prey populations,
compute the prefix sums of a list of numbers of any size.

Eg:  prefixSums( [1, 2, 1, 3, 4, 1] ) --> [1, 3, 4, 7, 11, 12]