Grammar assignment

Part I
Comment on the difference in meaning and form between the members of the following sentence pairs, using relevant and precise terminology to describe forms. Your answer must be written out in complete and coherent sentences.
1.
a. John ran up a bill.
b. John ran up a hill.
2.
a. My family has many friends.
b. My family have many friends.
PART II Give a syntactic analysis of the following sentences:
A. The swansong of Timothy West and Prunella Scales’s narrowboat adventures aired this week.
B. In their show’s best episodes, they revisit their own, real narrowboating holidays.
C. A simple thing that sets them apart is that they’re a lot older than almost anyone else on British television.