add sum and sum-negative
add raise to assn1
add raise to assn1
add alternating to assn1
add Scores data type to assn1
add Students data type to assn1
add assign-grades function to assn1
remove old debugging code from assn1
add stub for all-phd-pass? to assn1
add some test cases to all-phd-pass? (still incomplete)
finish all-phd-pass?
add stub for sort-by-midterm
add empty list test for sort-by-midterm
add already-sorted wtest for sort-by-midterm
Add answer to question 10 and some failing code for question 9
Merge branch 'master' of github.com:dmurvihill/cs4536