Classify each of the following departments in a factory that produces crme-filled snack cakes as a producing

Classify each of the following departments in a factory that produces crème-filled snack cakes as a producing department or a support department.
a. Janitorial
b. Baking
c. Inspection
d. Mixing
e. Engineering
f. Grounds
g. Purchasing
h. Packaging
i. Icing (frosts top of snack cakes and adds decorative squiggle)
j. Filling (injects crème mixture into baked snack cakes)
k. Personnel
l. Cafeteria
m. General factory
n. Machine maintenance
o. Bookkeeping