Re: Can a lay-person give the last rites?
What the Church means by ‘last rites’ is the sacrament of anointing. Only a priest or bishop can administer this sacrament. When you bring the Eucharist to the sick, you assist the priest in administering that sacrament, but it is only the priest or bishop who can consecrate the bread and the wine in the first place.
So yes, you may pray for the person, but no—you cannot administer the last rites.
Fr. Vincent Serpa, O.P.