Justifications for missed work:

student nr	PS or test whose weight will be moved to the final
----------	--------------------------------------------------
951094050	PS1
941778050	Test 1
990210696	PS2
961269760	PS3
970741090	Test 2
970424910	Test 2
981869570	PS3
009764235	? (please see me)
950888570	Test 2
981776520	Test 1 (yes?)