1)
In what regard is the Torah comparing the Asham to the Chatas?
1.
Zevachim, 11a: It teaches us that an Asham, like a Chatas, requires Semichah.
2)
What is "la'Kohen asher Yechaper bo lo Yih'yeh" referring to.?
1.
Oznayim la'Torah: It is referring to the Kohanim of the Beis-Av who are serving that day, who atone for the sinner by eating the Basar. 1
1
Oznayim la'Torah: As the Gemara states in Pesachim,59b 'Kohanim Ochlim u'Ba'alim Miskaprim'.
3)
Who is "ha'Kohen asher Yechaper bo" coming to preclude?
1.
Rashi: It precludes a T'vul-Yom, a Mechusar Kipurim and an Onan, who are not fit to perform the Avodah, from receiving a portion of the Asham.