Please help with biochem HW questions!!

Please help me with couple biochemistry homework questions~ Thanks

#1
The specific activity of an enzyme:
a) is given by the units rate/mg protein
b) increases as an enzyme is purified
c) decrease as the enzyme is purified
d) a) and b)
e) b) and c)

#2
Characteristic feature(s) of an enzyme includes
a) its position at the final step of a multistep biosynthetic pathway
b) its position at the initial step of a multistep biosynthetic pathway
c) its sigmoidal V vs. S curve
d) a) and c)
e) b) and c)