Bootstrapping in Level 2?

Just came across a bootstrapping question in Schweser SS 14 EOC question 12 (pg. 157).

a. Are we going to be asked a bootstrapping question during the level 2 test?

b. How do you solve for Z2/Z3 (step-by-step)? I’m sure I knew this at some point during L1, but for the life of me can’t calculate the correct values for the 2/3 year spot rates.