Schweser Module quiz 41.5 possible error

Q.1 Ask you to find post-money valuation at the time of second-round financing?

Now according to my understanding of the matter. We are suppose to find POST 2 which is the PV of 60mn discounted at 50% for 3 years but the solution says POST 2 is 60mn discounted at 50% discount rate for one year. Can anyone explain how am I wrong?