Okay are you certain it is impossible?Have you tried the answers 1, 1-and-a-half, 2? [edit: It is working okay on my browser.]
i was getting 27 wrong but currently i have 100% completion and the 4th part of the fourth level is possible
Which is the fourth level?
Day shift : lab or forge
Night shift : lab, forge or warehouse
Fourth level of Logs (warehouse)