Harmony 2005 and 2004 (minor)
As this has been the most difficult harmony question to date it gets a whole page of its own. Notice especially the syncopated rhythm which is the most important feature of the bass. Also notice the appoiatura (given) under the 3rd chord. For this reason several other appogiaturas are included but it doesn't always work. Sometimes a look at the interval created with the melody informs these decisions. This is by no means the only correct answer, but is well worth analysing.