NO Assuming you don't want to go dark on them
Ask so when does consultation begin (call your union rep if your a member) and make sure you all get an enhanced pay off
Start looking for a new job - experience in fighting a big attack like this might be of interest to various TLA's (assuming your grandparents are native born citizens)
I you find out early take your annual leave
Make sure to take your laptop home if you have one
The last two are in case mersk do what some other big European companies have done and try and avoid paying out - one case I know of was a uk subsidiary being made bankrupt