Need help mostly for 4), 5)and 6), using linux(bash) with awk, sed and find etc.

Which tool could be used to display only rows containing presidents who served two terms

Read each statement below. if the statement describes a peer-to-peer network, put a p next to it. if the statement describes a server-based network, put an s next to it. p - peer-to-peer s - server-based

Systolic pressure is a measure of blood pressure when the ventricles relax and fil with blood ture or false