Queries :: Inserting Missing Data In A Table

How to fix some records in my access table. It is a huge table more than 12k records!

In one of the field there are some data missing. The logic to reconstruct them is easy but I am not sure how to apply it in Access.

I have three columns one is the student ID, Year, term1 and term2

ID Year Term1 Term2
1234 2001 001 002
1234 2002 002 002
1234 2003 002 003
1234 2004
1234 2005 004 004
3311 2001 003 003
3311 2002 003 004
3311 2003
3311 2004 005 005

In the above example student 1234 has a missing record in year 2004 which supposed to be Term2 in the previous year (i.e. 003) and Term2 supposed to be Term1 value in the following year (i.e. 004). Similarly for student 3311

ID Year Term1 Term2
1234 2001 001 002
1234 2002 002 002
1234 2003 002 003
1234 2004 003 004
1234 2005 004 004
3311 2001 003 003
3311 2002 003 004
3311 2003 004 005
3311 2004 005 005