The readings of the scriptures by members of the congregation. It is likely that Jesus' reading is by pre-arrangement. The teaching part, whereby a distinguished person in the congregation is invited to speak, followed by a discussion. Jesus is the Spirit-bearer foretold in this Isaiah passage. The goal of his ministry is spelled out here.
Line c stands out as the focus of the verses.
For obvious reasons, the poor look toward this jubilee year with much hope. The year 2000 is our Jubilee year celebration. This gives the readers the impression that he is finished. Actually he is about to start. The speaker usually gives his address while seated.