A new pdf of homework 2 with improved pictures has been posted.
You will need to use your knowledge of how contacts are built to interpret the layouts in HW#2. The basic idea is the underneath layer being contacted needs to provide a landing pad that is about 3 times the size of the contact (small black square). The underlying layer is covered with an insulator and the contact mask then creates a hole the at the location of the small black square. The material making contact from above then fills the hole but needs to cover an area about 3 times larger than the hole in case there is misalignment.
The above means that for every contact there must be an underlying conducting material with size 3X the hole and a covering conducting material that is 3x the hole in size.
Unfortunately the word processors do allow both of the conducting layers to be viewed simultaneously.