Question 1:
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Consider the following program and the input and
output.

Find the UNKNOWNs in program output (you must understand
the program to do this).

Find the UNKNOWNs in program (for ClassName printing).
You basically write a program.

Print list of classes involved in the traversal
in alphabetical order. (Basically the set of classes
that your project would highlight.)

Find UNKNOWNs in the program to change the Exps-object.
You basically write a program.

Find UNKNOWNs in the displayed object 
(1 point per UNKNOWN, 10 UNKNOWNs). (This is easy).