Need homework help!

[UVAundergrad]

Hello everyone,

I have a homework problem that I drastically need help on. Here is a picture of the homework.

I apologize if this is the wrong place for this but I am incredibly grateful for any help I can get, I am completely lost right now.

Thank you!

[udo_sas]

Hello -

You may find some help here: https://www.otexts.org/fpp/8

Thanks,
Udo