Math 262 Final

You can choose to do one of the following two choices.
• Do the following exercise problems:
  Ex. 1.2.25
  Ex. 3.2.12
  Ex. 5.11.1
  Ex. 7.2.3
  Ex. 8.1.3
  The due time is March 22, 10am.
• Do the following research problem.
  Prove an intersecting theorem analogue to Ray-Chaudhuri-Wilson by choosing your family of sets (such a permutations, trees with labels, etc), and defining the intersection or interesecting patterns (as L).